A metro's heating and cooling is a portrait of its building history under its weather, and San Jose's portrait is painted below from its own records: Census housing figures, NOAA climate normals, the metro's ZIP codes and communities. TempReach USA's role is the connection to a local professional; the portrait is here so that connection starts from understanding rather than urgency.
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The median San Jose home was built in 1975; 59.7% of the stock predates 1980, and the pattern this metro's own data ranks first is the refrigerant transition reaching older systems. TempReach USA is a referral service, not an HVAC company: one call connects you with an independent local HVAC technician serving your ZIP code.
Two numbers frame everything that follows: 55.7% of San Jose homes are owner-occupied, and the median one was built in 1975. Ownership matters to HVAC because owners inherit their systems whole — every equipment decision a builder made in the 1970s or earlier is still in the attic, the closet and the side yard, ageing on its original schedule. With 59.7% of homes predating 1980 and 18.9% arriving since 2000, the metro is really two housing stocks sharing one map, and they are taken separately below before the problems are ranked.
The pre-1980 stock is where most of the metro's HVAC character lives. Homes from those decades in San Benito County and across San Benito, Santa Clara were built with duct layouts from the first age of central systems, furnaces and condensers that have since been renewed piecemeal, and insulation standards from another era, and each of those choices is now at or beyond the age its makers expected of it. Owner-occupiers hold 55.7% of the metro's homes, so most of the people reading this page are reading about a system they own outright — one whose failures arrive as surprises only if nobody has looked at the pattern: cooling fading a little each summer, a furnace recovering a little more slowly, one room drifting a little further from the thermostat.
Uniformity is the newer stock's defining trait. A subdivision in Sunnyvale or Santa Clara went up in a handful of years, fitted with one generation of equipment, one duct design, one thermostat class. That uniformity writes a calendar the whole street shares: the first heating wave, the first cooling wave, the first questions about refrigerant and charge arrive together, years before the same streets need anything structural. With 18.9% of the metro built since 2000, that calendar governs a large and growing share of San Jose's HVAC work — predictable work, if a household reads the calendar early.
One more record sits over the whole metro, and it is the one the equipment itself keeps: the weather's. SALINAS MUNICIPAL AP, CA US logs 12.58 inches of precipitation in an average year and swings between 6.2 days at 90 degrees or more and 5.6 nights at or below freezing. Heating systems ride that swing in their run hours; cooling systems ride it in their cycle counts; ducts ride it in the attics, expanding and contracting between the seasons. Cross the swing with the housing ages above and the selection of problems further down this page stops looking like a list and starts looking like an arithmetic result.
Housing eras and climate, joined — the two datasets every section of this page is built from.
Lay the eras side by side instead: 21.9% pre-1960 (156,617 homes), 37.8% from 1960-1979 (270,325), 21.3% from 1980-1999 (152,326), and 18.9% since 2000 (135,163). No single era tells the story — the proportions among them do, and those proportions are different in every metro this site covers.
Between the old metros and the new ones sits this one, its centre of gravity in the 1960-1979 band — the decades when cooling spread mid-stream through housing built without it. The consequence is a housing stock that must be read house by house: added ducts beside original ones, new condensers on old furnaces, controls from three decades in one hallway. San Jose's HVAC rewards the diagnostic visit more than most metros' do, because the street's average is a genuinely poor guide to the individual system.
The runner-up band is the oldest one: 21.9% of homes, some 156,617 of them, standing from before 1960. HVAC in that band is heritage work — duct layouts and equipment generations that have outlasted their design lives — and it punches above its share in the metro's repair diary, because age, not headcount, sets the failure rate.
San Jose's weather, reduced to what a system experiences: 6.2 hot days a year loading the cooling, 5.6 freezing nights loading the heating, and 12.58 inches of rain feeding the humidity both seasons complain about. NOAA's normals at SALINAS MUNICIPAL AP, CA US — 2,634 heating degree days, 134 cooling degree days — are the long average of that experience, and they are why this metro's problem list is not interchangeable with a milder or harsher metro's.
A profile is only useful if it predicts something, and this one predicts the shape of an HVAC diary in San Jose: which streets will call about cooling, which about heating, which about airflow, and in which months. Everything after this section is that prediction written out as services, problems and answers — the numbers first, the narrative second, the way the evidence actually runs.
Chosen by this metro's own housing and weather data — the same two records this whole page is built from.
A generation change is moving through San Jose's cooling equipment, and it arrives one repair decision at a time. For decades, residential systems ran on R-22; production and import of that refrigerant ended in the United States in 2020, so the supply that remains is reclaimed stock, and servicing a leaking R-22 system means weighing a scarce, aging refrigerant against the age of the machine it serves. Newer systems moved to R-410A, and equipment now arriving uses lower-impact refrigerants such as R-454B, with their own handling and code requirements. The transition matters to a homeowner at specific moments: when an older system needs a charge, when a coil or compressor fails on a machine whose refrigerant is effectively retired, when a repair quote must be compared honestly against replacement. Nothing about it is a reason for panic — R-22 systems are not banned from being serviced — but every significant repair on one is now also a planning conversation, and households in San Jose with equipment from the R-22 era benefit from having it before the hottest week, not during it.
A transition-aware service visit has a recognizable order. First, identification: the nameplate's refrigerant, model and year, stated aloud so the household and technician share the fact. Second, the leak question, taken seriously — a system low on charge has a leak until proven otherwise, and recharging without finding it is buying the same refrigerant twice on an installment plan. Third, the condition audit around the failure: compressor health, coil condition, electrical wear, because the decision the household faces is about the whole machine, not the one part that stopped. Fourth, the comparison itself, presented as what it is — the repair path with its realistic horizon, the replacement path with its — so the choice is made on the machine's merits and the household's plans for the home. In San Jose that conversation, held in a calm season, is unhurried and genuinely optional-feeling; held in a heat wave, the same facts arrive wearing a deadline.
The climate loads the stakes: a leaking system in San Jose underperforms through 6.2 days a year at 90 degrees or more at SALINAS MUNICIPAL AP, CA US, so the household pays the transition's toll twice — in refrigerant and in lost cooling — until the underlying decision is made.
A duct system is a delivery network, and in many San Jose homes it leaks like one. Supply runs carry conditioned air through attics, crawl spaces and wall cavities on their way to the registers; return runs carry it back. Every joint, seam and connection along those paths is a chance for the air to leave early or for unconditioned air to be pulled in, and older installations — assembled with tape that has long since dried out, or sections that have sagged apart — leak at many of them at once. The system responds the only way it can: by running longer to deliver the same comfort, which is why duct loss so often disguises itself as an equipment problem. The furnace and air conditioner get blamed, serviced, sometimes replaced, while the network between them quietly spills a share of every run into the attic. In San Jose's housing, where duct runs cross some of the hottest and coldest spaces in the home, a leak counts double: the air is lost, and the air that remains arrives changed by the space it traveled through.
The construction details explain the timeline. Duct joints are mechanical connections, and the sealants asked to make them permanent have finite lives: cloth-backed tape dries and releases, foil tape lifts at edges, and even mastic can crack where runs move with the building. Flex duct, common in the metro's later building decades, fails at its connections and where its inner liner is pierced or crushed — and a crushed section quietly throttles every room downstream of it. Meanwhile the spaces the ducts cross work against them: attic temperatures in a San Jose summer turn an uninsulated or leaking run into a heat exchanger pointed the wrong way, and winter reverses the argument in the crawl space. A duct system is therefore not a fixed asset but a slowly changing one, and its delivered performance in any given year is an empirical question, not a memory of its installation day.
The load figures complete the case: 134 cooling degree days and 2,634 heating degree days at SALINAS MUNICIPAL AP, CA US mean the network is in service in earnest at both ends of the year. Duct loss here is not a summer inefficiency or a winter one; it is a twelve-month tax on a system that works both seasons.
Every heating and cooling system ages, but in San Jose the ageing is concentrated where the housing is. The Census profile behind this page records 59.7% of homes built before 1980 and a median build year of 1975, which means a large share of the metro's furnaces, air conditioners and heat pumps are working in homes that have already outlived one or two generations of equipment — and much of the current generation is itself well into its second decade. Age shows differently than breakdown. An older system loses capacity a little at a time: refrigerant circuits seep at joints that have vibrated for years, blower motors draw more to move the same air, heat exchangers carry scale and rust, and control boards soldier on with components that drift out of tolerance. The household experiences it as a thermostat that needs a lower setting than it used to, rooms that lag, and a system that runs longer to do less. Nothing has failed; everything has faded, and the maintenance question becomes an honest one: what is left in this machine, and what does it need to give it back?
The mechanics of ageing are unglamorous and cumulative. Bearings wear and draw more current. Capacitor values drift downward year by year, weakening every start they assist. Coil surfaces oxidize and foul, shedding their ability to exchange heat a fraction at a time. Refrigerant leaves through seals and joints at a pace too small to notice in a season and large enough to matter in five. Electrical connections loosen under thermal cycling and add resistance that becomes heat. None of these processes stops, but most of them are measurable long before they are fatal — which is precisely what separates maintenance from repair. A tune-up measures the drift; a repair replaces whatever the drift finally claimed. The household that buys measurement regularly buys the choice of when to spend on renewal, and that choice is worth the most on the oldest equipment.
Climate presses the point. A system in San Jose works both ends of the year — 2,634 heating degree days against 134 cooling degree days at SALINAS MUNICIPAL AP, CA US — so its components accumulate in twelve months the wear a single-season climate would spread over two years.
Humidity announces itself politely before it announces itself seriously. The polite version, in a San Jose home, is a feeling: sheets that seem damp, a bathroom mirror that clears slowly, a basement corner with a smell that returns every wet week. The serious version builds quietly behind it — moisture condensing inside wall cavities and duct runs, conditions that invite mold growth in the places nobody opens, wood and finishes swelling and moving with the seasons. Cooling equipment stands in the middle of this story as the home's main dehumidifier, whether or not it was chosen for the role. When the equipment is oversized for the house, its runs are short and its drying is poor; when airflow is wrong, the coil's drying suffers; when duct leaks pull in humid air from the crawl space, the system imports the very burden it is asked to remove.
The physics of the burden are worth stating plainly. Air holds water as vapor; the amount it can hold rises with temperature, which is why warm air arriving in a San Jose summer carries so much of it indoors. A cooling coil removes moisture by passing air across a surface cold enough for water to condense on it — the same physics that beads a cold glass. Two conditions govern how much condenses: how long the air stays against the cold coil, and how cold the coil runs. Short cycles starve the first; high airflow can starve the second. Meanwhile the house keeps adding vapor from living and from its own damp places, and the envelope keeps trading air with the outdoors. Indoor humidity is the running balance of that account — removal by the coil against addition by everything else — and a house that feels damp is simply a house whose account is out of balance in the wet direction.
Housing stacks the burden: San Jose's 426,942 pre-1980 homes bring crawl spaces, older envelopes and duct runs through damp air to the contest. The moisture a system must remove is set by the house it serves — and much of this metro's housing imports generously.
One thermostat, one system, and a house that cannot agree on the temperature: the upstairs bakes while the downstairs needs a sweater, the addition never matches the original rooms, the far bedrooms run their own climate entirely. In San Jose this is among the most common comfort complaints in larger and multi-storey homes, and among the most misdiagnosed, because the equipment is usually innocent. A single system delivers air according to its duct network's design and its thermostat's location — and the thermostat only reports its own room. Floors gain heat differently, sun loads rooms differently by the hour, and duct runs deliver unevenly by length and condition, so the house's rooms drift apart while the system reports success at the one point it measures. The answers live at three levels: airflow correction in the existing network, zoning that lets one system serve areas on separate calls, and ductless equipment that gives the problem rooms their own dedicated capacity. Which level fits depends on how far apart the rooms are, and why — a diagnosis question before it is an equipment question.
A technician approaching uneven temperatures starts by refusing the thermostat's version of events. The readings that matter are taken in the rooms: supply temperatures and volumes at the registers, room temperatures over a system's full run, the difference a closed door makes to a room whose return path runs under it. Then the network gets its walk — trunk sizes, run lengths, damper positions, the condition of the far sections — and the two datasets are laid together. Rooms starved by defects announce themselves against the map; rooms starved by design announce themselves against the plan, the orientation and the hour. Only at that point does the conversation turn to remedies, and it turns with the cause named: correction for defects, zoning for a sectionable network serving different loads, ductless capacity for the spaces that were never truly part of the original design. In San Benito County's housing, all three remedies are in daily use — the skill is in the sorting.
The climate record sets the pattern's stakes in San Jose: 134 cooling degree days load the upper floors through the summer while 2,634 heating degree days expose the far rooms all winter. A house with an unsorted delivery map is audited at both ends of the year — the pattern is not seasonal, it is structural, and the seasons merely take turns proving it.
This climate's true examination arrives disguised as an exception: the one hot spell, the one cold snap, the week the metro's weather steps out of character. Then, all at once, San Jose's unexamined systems are interviewed together — and the interview reveals that mildness had not preserved them, only postponed their accounting. The households that pass the exceptional week without drama are the ones whose systems were kept to a standard the ordinary weeks never demanded. That is the whole seasonal argument here: in a gentle climate, readiness is a choice rather than a reaction, and the season to make it is whichever calm month is currently on the calendar.
The season loads San Jose's systems the way its record at SALINAS MUNICIPAL AP, CA US says it will: 2,634 heating degree days against 134 cooling degree days in an average year, against a housing stock whose median build year is 1975. The households that read the season early — filters, drains, a system run before the extreme weeks — are the ones whose calls stay schedulable.
There is a supply-side depth as well. A shrinking refrigerant does not vanish; it circulates — recovered from retired systems, reclaimed to specification, and returned to service at an expense that reflects the shrinking pool. In San Jose that means the R-22 in a system serviced this year may have cooled three other homes before it, and may cool another after this system retires, provided it is recovered rather than vented. The chain gives older equipment a managed twilight rather than a cliff: service remains possible, performed by technicians qualified for the work, for as long as the economics hold for the household. Understanding that chain replaces two common errors — that old systems are already unserviceable, and that they can be serviced forever as cheaply as ever — with the true picture: a gradually tightening supply, a gradually aging fleet, and a decision that improves with information and worsens with delay.
Why here and not everywhere: San Jose pairs 426,942 pre-1980 homes with 6.2 days a year at 90 degrees or more and 5.6 nights below freezing. Every metro pairs its housing with its weather somehow; this particular pairing is what puts the pattern where it sits on this page's list, ahead of problems that dominate metros built in other decades, under other skies.
Experienced local practice starts with the simple certainties — the observations that take minutes and decide the most:
Ordered by what this metro's data says its homes need most.
Ice on the line, a tripping breaker, run times that lengthen week by week — in San Jose these are the early chapters of a cooling failure, and a diagnosis caught at that stage is usually a component, not a system.
Ask what fills an AC repair diary in San Jose and the answer is written in its housing. The median home was built in 1975, and a good share of the metro's cooling equipment is older than the homes' current owners realise — units sized for a different era of insulation, charged with refrigerant generations that have since been phased down. A system in San Benito County that cools a little less each summer is telling a story in instalments, and the repair visit reads the whole story: pressures, airflow, the coil's condition, the duct losses behind the walls. It is why two San Jose homes of the same age, on different streets, so often need the same visit in the same year.
Count the exposure from the Census side: a median build year of 1975 across 715,146 housing units means half the metro's air conditioners are older than the systems in the growth suburbs around Sunnyvale, and summer runtime is the statistic that matters — the repair calls follow it street by street.
Where this service gets booked in San Jose follows the map on this page: the older districts generate the deep-end work, the post-2000 subdivisions the wear-and-tear work, and the 152,326 homes in between split the difference. Telling the call center your home's build decade — most San Jose owners know it within a few years — puts the right kit on the van the first time.
Verification is part of the service: a camera view, an opened panel, a register you can inspect yourself. The point of the visit is a duct system you have seen clean, not one you have been told is clean.
A word on timing, since San Jose households ask: duct cleaning earns its appointment when the evidence calls for it — after construction or renovation dust, when a home changes hands after years of one household's accumulation, when the registers show visible load or the blower compartment tells the story. Booked on evidence, it is honest work with visible results. Booked on a calendar superstition, it is a van ride. Local technicians who work from the evidence are the ones this page's routing favours, in San Jose and across the metro alike. Ask in Mountain View and the answer rhymes with San Jose: same eras, same equipment generations, same calendar of failures.
Duct demand concentrates in the metro's long-biography homes: 426,942 pre-1980 systems that have carried decades of household air, and the renovated homes around Mountain View (82,363 residents) whose construction dust is still in the runs.
In San Jose this service is booked most often through the problem patterns at the top of this page — the metro's housing data, not habit, sets the order. If your home is in the 59.7% built before 1980, mention its age on the call: it changes the parts the technician loads before heading to San Jose and the rest of the metro.
Honest limits, stated plainly: a tune-up does not make an old system new and cannot prevent every failure. It converts surprises into plans — which, across a system's life, is most of what reliability is made of.
Maintenance also has a paperwork virtue in San Jose: the recorded visit. Readings dated season by season — refrigerant pressures, temperature splits, capacitor values, the exchanger's noted condition — turn a system's decline from a surprise into a schedule. Households across San Benito, Santa Clara who keep those records meet replacements as appointments, and the technicians who write them are leaving the next visit, whoever makes it, a map of the system's life. In a metro of this size, that map is most of what local knowledge means. In San Jose that holds across 62 ZIP codes, from San Jose out to Santa Clara.
Tune-up demand follows the fleet's waves: the subdivisions' matched systems reaching service points together, the pre-1980 districts' individual units on individual schedules. Palo Alto sits inside one of those patterns; the readings taken there this season predict its systems' next one.
One local habit worth copying: San Jose homeowners who mention their street's building era when they book get a better-matched visit, because a technician heading to a the 1970s home in San Benito County loads different parts than one heading to a new-build subdivision in Sunnyvale. The service is the same; the preparation is local.
The MERV number is a match, not a score. The right filter figure is the highest the blower and ducts can pull air through without strain or bypass — chosen for the furnace in the basement, not the shelf in the store.
Air quality work in San Jose also has a quiet economics of attention: the households that measure first — a hygrometer on the wall, the filter inspected monthly against the light — tend to need the least equipment, because they catch the simple causes early: the filter long past its season, the bath fan venting into an attic, the return pulling unconditioned air through a leaky duct in the pre-1980 districts. The assessment visit formalises that attention with instruments, and prescribes in proportion to what it finds. That is the daily reality for the 674,655 households spread across San Benito, Santa Clara.
Air quality demand in this metro is written by its sealed seasons: 6.2 hot days with the windows shut around the cooling, 5.6 freezing nights with them shut around the heat. The 135,163 post-2000 homes hold their air tightest; the older districts around Gilroy exchange theirs with attics and crawl spaces.
In San Jose this service is booked most often through the problem patterns at the top of this page — the metro's housing data, not habit, sets the order. If your home is in the 59.7% built before 1980, mention its age on the call: it changes the parts the technician loads before heading to San Jose and the rest of the metro.
Multi-zone arithmetic matters in San Jose: outdoor capacity is shared among indoor units, so the design is reasoned around the household's real hours, not around every room at full demand at once.
Ductless systems find their San Jose homes where ductwork never went: the older districts' additions and converted spaces, the pre-1960 homes — 21.9% of the metro — built around boilers or gravity heat, the workshops and finished basements of the growth suburbs. A mini-split heats and cools a defined space without asking the house to grow ducts, which is why the assessment starts with the space itself: its exposure, its insulation era, how it is actually used across 6.2 hot days and the winter's coldest weeks. Locally the workload concentrates where the stock is oldest — the districts built around the 1970s first.
Scale the question by the Census count and it stays concrete: 715,146 housing units, a share of them holding rooms — additions, conversions, finished spaces — that no duct serves. The mini-split visit exists to give one of those rooms its own climate, sized to its exposure and use.
In San Jose this service is booked most often through the problem patterns at the top of this page — the metro's housing data, not habit, sets the order. If your home is in the 59.7% built before 1980, mention its age on the call: it changes the parts the technician loads before heading to San Jose and the rest of the metro.
With a median build year of 1975, many San Jose systems are reaching replacement age together; the professional you are connected with inspects ducts and electrics across 62 ZIP codes before recommending equipment.
From San Jose to Mountain View, a no-heat call through TempReach USA reaches a local professional whose visit includes the exchanger and venting checks that furnace work owes a San Jose household.
Heating installation in San Jose starts with a heat-loss calculation across San Benito, Santa Clara: the independent local professional measures the home's loss, inspects ducts and venting, and quotes the full scope before work begins.
Heat pump services in San Jose test the whole year-round system: the independent local professional covering San Benito, Santa Clara reads charge and airflow in both modes, proves defrost, and checks auxiliary heat logic before quoting any work.
In San Jose, the thermostat question splits by housing era: homes from around the median build year of 1975 often lack a common wire in the wall, while newer builds across the 62 covered ZIP codes usually carry one — the local professional checks the cable before choosing the control.
In San Jose, emergency means weather-relative: 2,634 heating degree days put no-heat calls on a freezing clock each winter, while 134 cooling degree days make a dead system a health question each summer — the call center triages against both, using the hours shown on this page.
In San Jose, commercial work follows the stock: 715,146 housing units' worth of mixed buildings — offices, retail and restaurants from San Jose across the 62 covered ZIP codes — each with rooftop units whose service rhythm the local professional sets per building.
There is a plainer way to say what this page's ranking means in practice: most calls in San Jose are two calls. The first answers The refrigerant transition reaching older systems; the second answers leaky ducts losing air and energy. Between them they account for the shape of a local technician's week here — the districts visited, the parts stocked, the diagnoses made fastest because they are made most often. The remaining services divide the rest of the diary among them, essential but episodic, the supporting work around two leading patterns.
PROBLEM
SOLUTIONPopulation 990,054
Population 153,455
Population 129,239
Population 82,363
Population 78,216
Population 67,231
Population 58,886
Population 58,561
Population 45,152
Population 43,003
Population 42,848
Population 32,775
Also in the San Jose metro: Los Gatos (population 32,773), Los Altos (population 30,736).
The communities in the grid are not suburbs of the page; they are its subject as much as San Jose is. Sunnyvale (153,455 residents) and Santa Clara (129,239) carry their own building decades, their own equipment generations and their own positions in the problem ranking's logic — a system under a Sunnyvale roof answers to the same data as one in the centre, but to a different era of it. Coverage here is defined by the ZIP list below; understanding is defined street by street, and this page's figures are the metro-wide version of a story each community tells in its own numbers.
Also on the San Jose map: Mountain View (82,363), Milpitas (78,216), Palo Alto (67,231), Cupertino (58,886), Gilroy (58,561) — communities spread across San Benito, Santa Clara, each with housing from its own growth years. A technician routed through TempReach USA to any of them is working from this same page: the metro data does not change at the city limit, but the housing on your street — its age, its equipment, its attic — is what the visit is really about.
The metro's weight is not evenly spread. San Jose holds 990,054 of the 1,969,353 residents; Sunnyvale and Santa Clara add 153,455 and 129,239; and the remainder scatters across the smaller places above, some no bigger than a few thousand people. HVAC follows the weight — most calls come from where most homes are — but era matters more than size: a small community of 1960s housing generates older-system work than a large new subdivision does.
One metro, 2 county lines drawn through it: San Benito, Santa Clara. The lines are invisible to the weather, but they structure everything administrative around an HVAC job — which office permits it, which inspector signs it, which code edition applies. San Benito County, at the centre, carries the oldest housing and the heaviest share of the work this page describes; its neighbours carry the growth. A routed local technician navigates the patchwork so the homeowner does not have to.
Beyond the metro line, the nearest covered metros are Santa Cruz, CA (35 miles away), Merced, CA (41 miles) and Salinas, CA (47 miles) — separate pages, separate profiles, because their housing and weather records are their own. Homeowners near the boundary sit between two datasets; the ZIP list above, not the map's edge, decides which page was written about your stock.
The region around San Jose is a set of variations on its theme: Santa Cruz, CA, 35 miles off, runs a median build year of 1973 on a metro population of 258,852; Merced, CA (41 miles) medians 1984 on 297,260; Salinas, CA (47 miles) medians 1975 on 433,729. Nearness is not sameness — a few decades of median build year separate their heating and cooling as surely as the miles separate their maps.
Ratios tell the metro's story compactly. Renters occupy 44.3% of homes; owners hold the rest. For every home built since 2000 there are 3.2 from before 1980. Spread the stock across the coverage map and each ZIP code carries about 11,535 housing units — the density at which era patterns repeat street after street instead of scattering, and at which a routed round of calls stays inside a few districts.
San Jose by the derived numbers — median home age 51 years · owners in 375,783 homes, renters in 298,872 · each covered ZIP code carrying about 2,526 pre-1960 homes · a heating-to-cooling degree-day ratio of 19.65 · 320 mm average annual rainfall.
County pages carry the local detail — land area, climate normals and the heating and cooling pressures on the ground in each county.
More plain-language help: the TempReach USA heating & cooling guides
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