Clark County heating and cooling, county by county: 629 square miles of Washington lying north of the Portland metro's centre, 18 ZIP codes, and a climate record read from VANCOUVER PEARSON AP, WA US. TempReach USA connects you with an independent local HVAC technician; this page sets out the county's own figures.
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The short version of this page: Clark County runs to 629 square miles, its weather is the record kept at VANCOUVER PEARSON AP, WA US — 4,400 heating degree days, 400 cooling degree days — and its systems live under a heating pressure. One call to TempReach USA, a referral service rather than an HVAC company, connects you with an independent local HVAC technician serving the county.
Before the narrative, the numbers themselves, because everything after them is commentary: at VANCOUVER PEARSON AP, WA US, the station whose NOAA 1991-2020 normals this county is read through, an average year holds 14.6 days at 90 degrees or above, 44.8 nights at or below freezing, 37.47 inches of precipitation and degree-day totals of 4,400 heating against 400 cooling. Spread over 629 square miles, with the county's centroid north of the Portland metro's centre and roughly 14 miles from the centre it is measured against, that record is Clark County's working climate.
The neighbours tell part of Clark County's heating story: Columbia County, Multnomah County, Skamania County are among the counties around it, all reading the same record at VANCOUVER PEARSON AP, WA US, all filling their diaries in the same cold weeks. What separates this county's share is its own ground — 629 square miles lying north of the Portland metro's centre, roughly 14 miles from the metro's centre — and its own housing, fitted across the decades its communities were built. The season is regional; the failures are local, one system at a time, at addresses only this county has.
The county's ground shapes the work in one more way: 629 square miles is a lot of roofs for a service map to hold, and Clark County's homes divide between its listed communities — Vancouver, Orchards — and the roads between them. A technician routed here is working a county, not a street: the drive between calls is part of the diary, and the systems at each end of it were fitted in the decades those communities were built.
Count the coverage from the codes upward: 98601, 98604 and 98606 are the first codes on Clark County's list of 18, spread across its 629 square miles in Washington. No two of those codes hold quite the same housing — one may be a settled community's streets, the next newer subdivisions, the next open county ground — so the same climate record produces a different run of calls inside each. The full list is printed on this page; the diary is written code by code.
Position first: Clark County lies north of the Portland metro's centre, roughly 14 miles from the metro's centre as the map measures it, with Columbia County, Multnomah County, Skamania County among the counties around it. Neighbourhood at county scale matters to heating and cooling because systems do not respect the border — the same subdivisions' building decades continue across it, the same cold snaps and heat waves examine both sides in the same night — while each county's page, this one included, keeps the local figures distinct.
A service calendar for Clark County can be written straight from its station record. Spring belongs to the cooling plant: 400 cooling degree days are coming, and the systems that will carry them are checked before the first of the 14.6 hot days arrives. Autumn belongs to the heating plant, ahead of 4,400 heating degree days and 44.8 freezing nights. The middle weeks belong to the unglamorous work — filters, drains, duct joints — that both seasons quietly depend on. The record at VANCOUVER PEARSON AP, WA US does not change much year to year, which is what makes the calendar worth keeping.
Clark County's named places — Vancouver, Orchards — anchor a county that is mostly ground between names: 629 square miles, 18 ZIP codes, and housing that follows the roads more than the towns. The wider metro it belongs to is anchored by Portland (642,715 residents) and Vancouver, but this county's own diary is quieter and more spread out: individual systems in individual houses, ageing on the schedule of the decade each house was built, from the named communities outward.
Census figures give Clark County's heating and cooling its proportions. The metro it belongs to counts 1,050,449 housing units across 1,000,418 households, 62.0% of them owner-occupied, and the era mix runs 22.2% before 1960, 24.0% from 1960 to 1979, 27.2% from 1980 to 1999 and 26.5% since 2000. A county inside that metro inherits the mix in its own proportions — which is why two homes on the same Clark County street, built forty years apart, can need entirely different conversations from the same technician.
Coverage, for Clark County, is a set of overlapping maps. The land map is 629 square miles. The address map is 18 ZIP codes and 2 listed communities. The service map is the Portland metro, whose coverage the county sits inside — north of the Portland metro's centre, roughly 14 miles from its centre. The weather map is one station's record, kept at VANCOUVER PEARSON AP, WA US. A home in this county lives on all four maps at once, and its heating and cooling needs are set by the combination.
City pages carry the metro-wide homework — housing eras, the problem ranking, services in depth. This county sits inside their coverage.
Population 192,696
Population 29,716
TempReach USA is not an HVAC company. We employ no heating or cooling technicians, we run no service trucks, and we do not carry out HVAC work of any kind. This website and its call center exist for one purpose: to connect homeowners with independent local heating and cooling professionals who serve their area. When you call the number on this site, your call is routed to such a professional. From that point, everything about the job belongs to that professional and to you: the assessment, the work itself, the scheduling, what you are charged, and the terms of any agreement you reach. The professional who takes your job is solely responsible for it. The technician who arrives at your home runs their own business; they are not an employee, agent or subcontractor of TempReach USA. Our part is the information on these pages — assembled from Census Bureau housing data and NOAA climate records for each metro — and the routing of your call. We state this plainly on purpose: you should know exactly who you are hiring before anyone picks up a wrench or a gauge.
One call connects you with an independent local heating and cooling professional serving Clark County and the Portland metro.
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