The county-level homework for McCook County, South Dakota — its 574 square miles, its 6 ZIP codes, its place inside the Sioux Falls 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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The short version of this page: McCook County runs to 574 square miles, its weather is the record kept at SIOUX FALLS, SD US — 7,248 heating degree days, 847 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.
The climate figures on this page are the primary metro's NOAA 1991-2020 normals — climate normals recorded at SIOUX FALLS, SD US, the station for the Sioux Falls metro this county belongs to. An average year there brings 7,248 heating degree days, 847 cooling degree days, 27.85 inches of precipitation, 15.0 days at 90 degrees or above and 162.0 nights at or below freezing, around an average temperature of 47.3 degrees.
Divide McCook County's cold by its coverage and the heating diary sharpens: 6 ZIP codes over 574 square miles, 95.7 square miles per code on average, the codes running from 57012 to 57374. A furnace failure in the code nearest the metro reads differently from one at the county's far edge — not in the fault, which is the same worn igniter or tired blower, but in everything around it: the drive, the house's decade, the odds the system has already been replaced once. The cold itself, 7,248 heating degree days of it, is shared; the ground it is answered on is not.
The county's ground shapes the work in one more way: 574 square miles is a lot of roofs for a service map to hold, and McCook County's homes divide between its listed communities — Salem — 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.
The ZIP list is the county's working map. McCook County carries 6 codes, running from 57012 through 57058 in the middle of the list to 57374 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.
The counties around McCook County include Lincoln County, Minnehaha County, Rock County, and the whole group shares the Sioux Falls metro's climate record from SIOUX FALLS, SD US. What the neighbours do not share is this county's ground: 574 square miles, 6 ZIP codes, a centroid northwest of the Sioux Falls metro's centre. Service patterns cross the county line freely — a cold week fills diaries on both sides of it — but the mix of housing and systems on each side is its own, which is why each county in the group carries its own page.
Extremes, not averages, fill McCook County's emergency diary, and the record names them precisely: 15.0 days a year at 90 degrees or above, 162.0 nights at or below freezing. Between those figures sits the ordinary year — an average of 47.3 degrees, 27.85 inches of rain — in which systems mostly age quietly. The two ends are when ageing becomes failure, which is why the county's dominant heating pressure, the taller of its two peaks, sets the rhythm of its maintenance year as well.
The county record names Salem among McCook County's communities — a short list, and an honest one: much of the county's housing sits outside its named places, along the roads and in the settlements between them, across 574 square miles of South Dakota. The heating and cooling diary follows that pattern. Calls cluster where the named communities cluster, then spread out along the county's ZIP codes, and the systems at the far ends of those drives were fitted in the decades their houses were built, community or no community.
The growth figures deserve their own reading in McCook County. 37.1% of the Sioux Falls metro's homes were built since 2000 — the largest or near-largest band in many of its counties — and those homes are now old enough that their first systems are reaching replacement age together, subdivision by subdivision. Set against them, the 40.2% of the metro's stock that predates 1980 is deep into its second and third systems. One county, two replacement waves running at once, and a maintenance diary that has to serve both.
Put the county's coverage facts in one place and they read like this: 574 square miles of land in South Dakota, 1 listed communities, 6 ZIP codes, 4 neighbouring counties on the record, and a place inside the Sioux Falls 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 1,201
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 McCook County and the Sioux Falls 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