Franklin County heating and cooling, county by county: 1,242 square miles of Washington lying northeast of the Kennewick metro's centre, 5 ZIP codes, and a climate record read from PASCO TRI CITIES 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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Franklin County covers 1,242 square miles in Washington. Its climate is read from the normals recorded at PASCO TRI CITIES AP, WA US — 5,011 heating degree days against 788 cooling degree days — and its dominant pressure is a heating one. TempReach USA is a referral service, not an HVAC company: one call connects you with an independent local HVAC technician serving the county.
Every climate number on this page comes from one record: the NOAA 1991-2020 normals at PASCO TRI CITIES AP, WA US, the primary metro's station, read here for Franklin County. The record's shape is 5,011 heating degree days set against 788 cooling degree days, 7.62 inches of precipitation in an average year, 54.7 days reaching 90 degrees or above and 112.3 nights at or below freezing, with an average temperature of 53.3 degrees across the year.
The heating season also has an address pattern in Franklin County. Its 5 ZIP codes divide 1,242 square miles into service ground where the same January night lands on older streets, subdivisions and edge communities at once, and the county's position — northeast of the Kennewick metro's centre, roughly 18 miles from the metro's centre — shapes which parts of the county feel the Kennewick metro's cold at full strength. The systems answer accordingly: one long heating season, read ZIP by ZIP, with the oldest furnaces and heat exchangers carrying the heaviest share of it.
One more county fact belongs in the record: position. Franklin County sits at 46.537502, -118.903891 on the map — the centroid of a county whose communities spread across 1,242 square miles of Washington. Position decides which end of the metro's weather arrives first and which of its service patterns a household here meets most; the rest of this page is that position, read through the climate record and the metro's data.
The ZIP list is the county's working map. Franklin County carries 5 codes, running from 99301 through 99330 in the middle of the list to 99343 at its end, and every code on it is a small housing census of its own — the building decades, the system generations, the duct materials of its streets. Heating and cooling work routed by those codes meets the county in slices, and the slices differ more than the county's shared climate record would suggest.
There are 1 counties on Franklin County's neighbour list, Benton County among them, and the list is a reminder that a county page is a slice of a continuous map. The slice is worth keeping separate: this county's land area, its ZIP codes and its communities are its own, and its heating and cooling pressure — the heating profile described above — lands on its own housing. But the slice only makes full sense beside its neighbours, whose pages are linked from this one for exactly that reason.
The county's year divides by load. At one end, 54.7 days at 90 degrees or above pull the cooling season into its long peak; at the other, 112.3 nights at or below freezing do the same for heating; between them sit the shoulder weeks when neither plant runs hard. An average temperature of 53.3 degrees at PASCO TRI CITIES AP, WA US is what those two ends average out to, and 7.62 inches of precipitation spread across the year decide how much of the cooling season is also a moisture season. Franklin County's households plan around that division — service ahead of the taller peak, filters and checks in the shoulders — whether they name it or not.
There is a practical reason this page names Franklin County's communities one by one. A heating or cooling system belongs to a house, a house belongs to a community, and the community's building decade is the strongest single clue to what the system will need — the 5 places recorded here, from Connell through Hatton and beyond, each carry that clue in their streets. The metro data on the Kennewick page describes the whole region; this list is where the description becomes local.
The housing behind Franklin County's systems is the Kennewick metro's housing, read at county scale. The largest single share of the metro's homes was built since 2000 — 36.2% of the stock — with 43.0% of homes predating 1980 and 36.2% arriving since 2000, around a median build year of 1990. Inside the county those eras divide by community and by street, but the proportions set the diary: a stock weighted to since 2000 produces the service patterns of that era's systems, ducts and insulation, in this county as across the metro.
Put the county's coverage facts in one place and they read like this: 1,242 square miles of land in Washington, 5 listed communities, 5 ZIP codes, 1 neighbouring counties on the record, and a place inside the Kennewick metro coverage. No single figure describes the county; the set of them does, and it is the set this page is organised around, from the climate record above to the community and ZIP lists below.
City pages carry the metro-wide homework — housing eras, the problem ranking, services in depth. This county sits inside their coverage.
Population 5,080
Population 1,527
Population 631
Population 453
Population 171
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 Franklin County and the Kennewick metro.
Call center hours: Mon-Fri 7:00 AM-10:00 PM ET | Sat 8:00 AM-10:00 PM ET | Sun 7:00 AM-9:00 PM ET