Hays County heating and cooling, county by county: 677 square miles of Texas lying west of the Austin metro's centre, 7 ZIP codes, and a climate record read from AUSTIN BERGSTROM AP, TX US. TempReach USA connects you with an independent local HVAC technician; this page sets out the county's own figures.
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In brief: 677 square miles of Texas, a climate read from AUSTIN BERGSTROM AP, TX US's normals, and a cooling pressure as the county's dominant one — 1,718 heating degree days set against 2,996 cooling degree days in an average year. TempReach USA does not do the work itself; it is a referral service, and one call connects you with an independent local HVAC technician serving Hays County.
One record, one county: the normals at AUSTIN BERGSTROM AP, TX US — 1,718 heating degree days, 2,996 cooling degree days, 35.57 inches of precipitation, an average temperature of 68.4 degrees — applied to Hays County's own 677 square miles and its 7 ZIP codes. The figures are the Austin metro's; the ground they are applied to, lying west of the Austin metro's centre, is this county's alone, and this section reads the two together.
Cooling writes this county's HVAC calendar. With 2,996 cooling degree days against 1,718 heating degree days in the normals recorded at AUSTIN BERGSTROM AP, TX US, the systems across Hays County spend their lives working the hot half of the year: condensers cycling through 123.5 days at 90 degrees or more, coils pulling moisture out of the air for month after month. The pressure shows up as midsummer breakdowns, capacities fading on the oldest equipment first, and a maintenance calendar that has to be kept in spring — because by the time the heat arrives, the county's systems are already on stage.
One more county fact belongs in the record: position. Hays County sits at 30.061225, -98.029267 on the map — the centroid of a county whose communities spread across 677 square miles of Texas. 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.
A ZIP code in Hays County is a small climate-and-housing district of its own. The county's 7 codes — 78610, 78619, 78620, 78640 among them — all read the same normals from AUSTIN BERGSTROM AP, TX US, yet the systems inside them were installed in different decades, serve different house sizes, and fail in different orders. That is why this page prints the whole list rather than a summary: the codes are the finest division of the county the data supports, and they are the division the work itself follows.
Hays County sits alongside Bastrop County, Caldwell County, Travis County in the Austin area — 4 neighbouring counties share its coverage map in all, and the borders between them are lines on a map rather than changes in the weather. The same station record travels across those borders, the same housing decades appear on both sides, and a technician's ground here is really the cluster: this county and its neighbours, read together, with this page keeping Hays County's own share of the picture separate.
Extremes, not averages, fill Hays County's emergency diary, and the record names them precisely: 123.5 days a year at 90 degrees or above, 33.0 nights at or below freezing. Between those figures sits the ordinary year — an average of 68.4 degrees, 35.57 inches of rain — in which systems mostly age quietly. The two ends are when ageing becomes failure, which is why the county's dominant cooling pressure, the taller of its two peaks, sets the rhythm of its maintenance year as well.
Hays County's named places — San Marcos, Kyle — anchor a county that is mostly ground between names: 677 square miles, 7 ZIP codes, and housing that follows the roads more than the towns. The wider metro it belongs to is anchored by Austin (967,862 residents) and Round Rock, 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.
The housing behind Hays County's systems is the Austin metro's housing, read at county scale. The largest single share of the metro's homes was built since 2000 — 51.0% of the stock — with 20.2% of homes predating 1980 and 51.0% arriving since 2000, around a median build year of 2000. 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.
The county is worth a page of its own because its facts do not reduce to its metro's. The Austin metro supplies the climate station and the housing profile, but Hays County supplies everything at ground level: 677 square miles, its own communities and codes, its own neighbours — Bastrop County, Caldwell County, Travis County among the 4 on its list — and its own position, west of the Austin metro's centre. The metro page and this page link to each other because neither half of that picture stands well without the other.
City pages carry the metro-wide homework — housing eras, the problem ranking, services in depth. This county sits inside their coverage.
Population 68,920
Population 52,439
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 Hays County and the Austin 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