St. John the Baptist Parish heating and cooling, county by county: 214 square miles of Louisiana lying northwest of the New Orleans metro's centre, 5 ZIP codes, and a climate record read from NEW ORLEANS ALVIN CALLENDER FL, LA US. TempReach USA connects you with an independent local HVAC technician; this page sets out the county's own figures.
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Start here if you read nothing else: this page covers St. John the Baptist Parish, Louisiana — 214 square miles, 1 listed communities, a centroid northwest of the New Orleans metro's centre. Its climate record, from NEW ORLEANS ALVIN CALLENDER FL, LA US, sets a humid pressure on its systems. TempReach USA publishes the homework and routes the call; an independent local HVAC technician serving the county does the work.
Read St. John the Baptist Parish's weather the way this page reads it: through the thirty-year normals kept at NEW ORLEANS ALVIN CALLENDER FL, LA US for the New Orleans metro. Those normals give the county 2,615 cooling degree days and 1,425 heating degree days a year, 63.8 inches of precipitation, 64.4 days at 90 degrees or above, 10.8 nights at or below freezing, and an average temperature of 68.2 degrees — the fixed background every system in the county works against.
Humidity in St. John the Baptist Parish also divides by code. The county's 5 ZIP codes — 70049, 70051, 70068, 70076 at the head of the list — spread 214 square miles of housing under the same wet record: 63.8 inches of precipitation a year and 2,615 cooling degree days of load, read at NEW ORLEANS ALVIN CALLENDER FL, LA 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.
The county's neighbours frame it as well: Orleans Parish, Plaquemines Parish, St. Bernard Parish are among the 6 counties on its neighbour list, and together they form the working ground around St. John the Baptist Parish's own 214 square miles. A system near a shared border lives in both counties' weather at once, whichever page describes its home — the pages divide the map so the record can be read county by county, and the links between them keep the whole in view.
5 ZIP codes reach into St. John the Baptist Parish's 214 square miles, among them 70049, 70051, 70068, 70076 — an average of 42.9 square miles of county ground per code. The codes are more than a mailing grid here: they are how the county's service ground divides in practice, each code holding its own mix of housing eras, its own streets of systems ageing on their own schedules. A call in one code and a call in the next can be the same fault in different decades of house.
The counties around St. John the Baptist Parish include Orleans Parish, Plaquemines Parish, St. Bernard Parish, and the whole group shares the New Orleans metro's climate record from NEW ORLEANS ALVIN CALLENDER FL, LA US. What the neighbours do not share is this county's ground: 214 square miles, 5 ZIP codes, a centroid northwest of the New Orleans 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 St. John the Baptist Parish's emergency diary, and the record names them precisely: 64.4 days a year at 90 degrees or above, 10.8 nights at or below freezing. Between those figures sits the ordinary year — an average of 68.2 degrees, 63.8 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.
The county record names Laplace among St. John the Baptist Parish'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 214 square miles of Louisiana. 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 county's position frames its housing as well. St. John the Baptist Parish lies northwest of the New Orleans metro's centre, roughly 33 miles out, and the metro's era mix — 33.5% built between 1960 and 1979, 31.2% before 1960, median year 1973 — reads at this distance with a county accent: the shares nearer the centre and the shares at the edge were platted in different decades of the metro's growth. Which band a given St. John the Baptist Parish street belongs to is a local fact; that the bands exist, in these proportions, is the Census record this page is built on.
Put the county's coverage facts in one place and they read like this: 214 square miles of land in Louisiana, 1 listed communities, 5 ZIP codes, 6 neighbouring counties on the record, and a place inside the New Orleans 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 28,480
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 St. John the Baptist Parish and the New Orleans 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