Hancock County heating and cooling, county by county: 474 square miles of Mississippi lying southwest of the Gulfport–Biloxi metro's centre, 6 ZIP codes, and a climate record read from GULFPORT - BILOXI AP, MS US. TempReach USA connects you with an independent local HVAC technician; this page sets out the county's own figures.
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Hancock County in one paragraph: 474 square miles in Mississippi, 6 ZIP codes, a humid climate pressure read from the normals at GULFPORT - BILOXI AP, MS US, and housing that answers 1,507 heating degree days against 2,749 cooling degree days a year. TempReach USA is a referral service, not an HVAC company — one call connects you with an independent local HVAC technician serving this county.
Before the narrative, the numbers themselves, because everything after them is commentary: at GULFPORT - BILOXI AP, MS US, the station whose NOAA 1991-2020 normals this county is read through, an average year holds 69.2 days at 90 degrees or above, 15.8 nights at or below freezing, 62.82 inches of precipitation and degree-day totals of 1,507 heating against 2,749 cooling. Spread over 474 square miles, with the county's centroid southwest of the Gulfport–Biloxi metro's centre and roughly 26 miles from the centre it is measured against, that record is Hancock County's working climate.
Humidity in Hancock County also divides by code. The county's 6 ZIP codes — 39520, 39525, 39529, 39556 at the head of the list — spread 474 square miles of housing under the same wet record: 62.82 inches of precipitation a year and 2,749 cooling degree days of load, read at GULFPORT - BILOXI AP, MS US. Drains, coils and blowers meet that record in every code, but the housing they serve was fitted decade by decade, so the moisture diary is written code by code rather than county-wide at once.
One more county fact belongs in the record: position. Hancock County sits at 30.391641, -89.482791 on the map — the centroid of a county whose communities spread across 474 square miles of Mississippi. 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.
There is a scale fact hidden in Hancock County's ZIP codes: 6 codes across 474 square miles works out to 79.0 square miles per code, which makes a service call here a matter of ground as well as of systems. The codes on the metro-facing side of the county — the county sits southwest of the Gulfport–Biloxi metro's centre — and the codes at its far edge hold different ground, but both ends ask the same climate questions of their heating and cooling, at different distances.
Position first: Hancock County lies southwest of the Gulfport–Biloxi metro's centre, roughly 26 miles from the metro's centre as the map measures it, with Harrison County, Jackson County, Stone County among the counties around it. Neighbourhood at county scale matters to heating and cooling because systems do not respect the border — the same subdivisions' building decades continue across it, the same cold snaps and heat waves examine both sides in the same night — while each county's page, this one included, keeps the local figures distinct.
The precipitation figure earns its place in Hancock County's record: 62.82 inches a year at GULFPORT - BILOXI AP, MS US, falling through both the cooling months and the heating ones. Rain loads condensate systems in summer, tests outdoor units and venting in winter, and keeps the ground around the county's 6 ZIP codes cycling between wet and dry in a way that shows up in crawl spaces and condensate lines. Set beside 69.2 hot days and 15.8 freezing nights, it completes the picture of what the county's equipment actually lives in.
There is a practical reason this page names Hancock 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 3 places recorded here, from Bay St. Louis through its remaining communities and beyond, each carry that clue in their streets. The metro data on the Gulfport–Biloxi page describes the whole region; this list is where the description becomes local.
The housing behind Hancock County's systems is the Gulfport–Biloxi metro's housing, read at county scale. The largest single share of the metro's homes was built since 2000 — 37.1% of the stock — with 37.1% of homes predating 1980 and 37.1% arriving since 2000, around a median build year of 1991. 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.
One way to hold Hancock County in mind is as the local layer of a wider dataset. Above it sits the Gulfport–Biloxi metro, with its Census housing profile and its NOAA station at GULFPORT - BILOXI AP, MS US. At this level sit the county's own numbers — 474 square miles, 3 neighbouring counties, 6 ZIP codes, 3 listed places — and below it, not published anywhere, sit the individual homes whose systems all of it describes. This page works at the middle level, where the data is still local enough to act on.
City pages carry the metro-wide homework — housing eras, the problem ranking, services in depth. This county sits inside their coverage.
Population 9,971
Population 9,338
Population 7,066
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 Hancock 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