The county-level homework for Harrison County, Mississippi — its 574 square miles, its 11 ZIP codes, its place inside the Gulfport–Biloxi 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: Harrison County runs to 574 square miles, its weather is the record kept at GULFPORT - BILOXI AP, MS US — 1,507 heating degree days, 2,749 cooling degree days — and its systems live under a humid 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.
One record, one county: the normals at GULFPORT - BILOXI AP, MS US — 1,507 heating degree days, 2,749 cooling degree days, 62.82 inches of precipitation, an average temperature of 68.3 degrees — applied to Harrison County's own 574 square miles and its 11 ZIP codes. The figures are the Gulfport–Biloxi metro's; the ground they are applied to, lying close to the centre of the Gulfport–Biloxi metro, is this county's alone, and this section reads the two together.
Humidity writes this county's HVAC calendar. The normals recorded at GULFPORT - BILOXI AP, MS US — 2,749 cooling degree days, 62.82 inches of precipitation in an average year — describe a county where cooling is only half the job: the other half is pulling moisture out of indoor air, day after day, through the long wet season. The pressure shows up as systems that cool the thermometer's number while leaving the house feeling clammy, condensate drains running at their limit, and coils that ice when airflow falters. Across Harrison County's 574 square miles, dehumidification is not an accessory conversation; it is the main one.
Set the county inside its metro and the picture completes. Harrison County answers to the Gulfport–Biloxi metro's data — its housing profile, its problem ranking, its climate station — but the county is where that data touches ground: 5 communities, 11 ZIP codes, one county's worth of systems ageing under the record kept at GULFPORT - BILOXI AP, MS US. This page is that ground-level reading, kept separate from the metro page so the local detail is never averaged away.
A ZIP code in Harrison County is a small climate-and-housing district of its own. The county's 11 codes — 39501, 39503, 39507, 39530 among them — all read the same normals from GULFPORT - BILOXI AP, MS 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.
Read the map around Harrison County and a working region appears: Hancock County, Jackson County, Stone County are the neighbouring names at the head of its list of 3, and together these counties form the ground a local technician actually covers. The county line decides which page describes a home; it does not decide the weather the home's system faces, the decade its street was built in, or the season its diary fills. Those are regional — and the region, on this site, is a set of county pages that link to one another, as the cards below do.
Extremes, not averages, fill Harrison County's emergency diary, and the record names them precisely: 69.2 days a year at 90 degrees or above, 15.8 nights at or below freezing. Between those figures sits the ordinary year — an average of 68.3 degrees, 62.82 inches of rain — in which systems mostly age quietly. The two ends are when ageing becomes failure, which is why the county's dominant humid pressure, the taller of its two peaks, sets the rhythm of its maintenance year as well.
Name the ground and the work follows: in Harrison County, the 5 listed communities — Gulfport, Biloxi, Long Beach, D'Iberville 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 574 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.
Census figures give Harrison County's heating and cooling its proportions. The metro it belongs to counts 187,371 housing units across 164,768 households, 67.5% of them owner-occupied, and the era mix runs 10.3% before 1960, 26.8% from 1960 to 1979, 25.8% from 1980 to 1999 and 37.1% since 2000. A county inside that metro inherits the mix in its own proportions — which is why two homes on the same Harrison County street, built forty years apart, can need entirely different conversations from the same technician.
Coverage, for Harrison County, is a set of overlapping maps. The land map is 574 square miles. The address map is 11 ZIP codes and 5 listed communities. The service map is the Gulfport–Biloxi metro, whose coverage the county sits inside — close to the centre of the Gulfport–Biloxi metro, roughly 7 miles from its centre. The weather map is one station's record, kept at GULFPORT - BILOXI AP, MS 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 72,533
Population 49,011
Population 16,876
Population 13,033
Population 7,797
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 Harrison County and the Gulfport–Biloxi 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