The county-level homework for Thurston County, Washington — its 723 square miles, its 14 ZIP codes, its place inside the Olympia metro's coverage. TempReach USA connects homeowners here with independent local HVAC technicians; the record behind the routing is on this page.
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Thurston County covers 723 square miles in Washington. Its climate is read from the normals recorded at OLYMPIA AP, WA US — 5,378 heating degree days against 113 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.
The station for this county's metro is OLYMPIA AP, WA US, and its NOAA 1991-2020 normals are the source of every figure in this section. Precipitation averages 50.62 inches a year; the temperature record averages 50.5 degrees, built from 6.4 days at 90 or above and 77.1 nights at or below freezing; the workload totals 5,378 heating degree days and 113 cooling degree days. Thurston County is read through that record throughout this page.
There is a second heating pressure in Thurston County that the degree days only imply: repetition across distance. A cold snap does not visit one street here; it visits all 14 of the county's ZIP codes in the same night, from the communities nearest the metro's centre to the edge of its 723 square miles, and every ageing system in that ground is examined by the same low temperature at the same hour. That simultaneity — many systems, one weather, a county's worth of roads between the calls — is what makes the cold weeks in a heating-profile county feel different from the same weeks in a city.
Distance is the county fact the climate table leaves out. Thurston County's centroid lies close to the centre of the Olympia metro, roughly 0 miles from the centre it is measured against, and that distance is travelled on every call routed here — out through the metro's nearer counties and into this one's 14 ZIP codes. Local knowledge in a county like this is partly a map held in the head: which roads, which communities, which end of the county a call is coming from.
Routing in Thurston County is written in five digits. The county's codes begin at 98501 and run to 98597, 14 in total, and between the first and the last sits the county's full spread of ground — 723 square miles from the metro-facing edge to the far side. A technician's week here is a tour of those codes, and the tour is also a tour of the county's building history, because each code's systems were largely fitted when that code's streets were built.
A county with no neighbours on its record is a simpler map: Thurston County, 723 square miles of Washington, sitting close to the centre of the Olympia metro and carrying the Olympia metro's coverage at its edge. Nothing about the work simplifies with the map — the county's housing still spans its building decades, its systems still answer the full degree-day record — but the page can keep its whole attention on one county's ground, which is what it does.
Consider what one year asks of a system in Thurston County: a cooling season measured at 113 degree days, a heating season at 5,378, 6.4 days of serious heat and 77.1 freezing nights, and 50.62 inches of precipitation working on every outdoor unit through all of it. No single figure is remarkable; the combination is the county's climate, and it is the combination a system has to survive for fifteen or twenty years. The service patterns described on this page are that arithmetic, playing out across 723 square miles of housing.
Name the ground and the work follows: in Thurston County, the 9 listed communities — Lacey, Olympia, Tumwater, Tanglewilde among them — hold the county's homes, and the homes hold its heating and cooling systems. The largest places supply the steadiest run of calls; the smaller communities supply the long drives and the systems fitted when those places were built. Either way, the county's 723 square miles are not read as one housing stock on this page, because on the ground they are not one: they are these communities, in this order, with these names.
Age is the county's second climate. The Olympia metro's median home was built in 1991, and 34.8% of its homes predate 1980 — in Thurston County, that share is the older districts and the long-settled communities, where ductwork from an earlier equipment era still serves replacement systems. The newer share, 33.0% built since 2000, concentrates in the county's growth edges. The service diary divides along that line: deep equipment-and-duct conversations at the old end, first-replacement and control conversations at the new one.
There is a reason the coverage on this page is described county-first. Heating and cooling demand is generated house by house, and houses sit in counties: in Thurston County's case, across 723 square miles that hold 9 listed communities and 14 ZIP codes, close to the centre of the Olympia metro. The metro frame matters — the station, the housing eras, the problem ranking all come from it — but the county is where the frame touches the ground, and the ground is where the systems are.
City pages carry the metro-wide homework — housing eras, the problem ranking, services in depth. This county sits inside their coverage.
Population 57,088
Population 55,583
Population 26,519
Population 6,822
Population 6,025
Population 2,499
Population 1,965
Population 513
Population 511
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 Thurston County and the Olympia 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