Heating and cooling help across Johnson County, Kansas — 5 communities and 32 ZIP codes, inside the Kansas City metro's coverage. TempReach USA connects you with an independent local HVAC technician; this page is the county-level homework.
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
The short version of this page: Johnson County runs to 474 square miles, its weather is the record kept at LEES SUMMIT MUNI AP, MO US — 4,786 heating degree days, 1,446 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.
One record, one county: the normals at LEES SUMMIT MUNI AP, MO US — 4,786 heating degree days, 1,446 cooling degree days, 38.34 inches of precipitation, an average temperature of 55.7 degrees — applied to Johnson County's own 474 square miles and its 32 ZIP codes. The figures are the Kansas City metro's; the ground they are applied to, lying southwest of the Kansas City metro's centre, is this county's alone, and this section reads the two together.
Heating writes this county's HVAC calendar. With 4,786 heating degree days against 1,446 cooling degree days in the normals recorded at LEES SUMMIT MUNI AP, MO US, the systems across Johnson County earn their keep in the cold half of the year: furnaces and heat pumps cycling through 96.3 nights at or below freezing, when a breakdown stops being a comfort problem and becomes a household one. The pressure shows up as midwinter failures on the oldest equipment first, and a maintenance calendar that has to be kept in autumn — because by the time the cold arrives, the county's systems are already on stage.
One more county fact belongs in the record: position. Johnson County sits at 38.883907, -94.82233 on the map — the centroid of a county whose communities spread across 474 square miles of Kansas. 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 Johnson County's ZIP codes: 32 codes across 474 square miles works out to 14.8 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 Kansas City 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: Johnson County lies southwest of the Kansas City metro's centre, roughly 21 miles from the metro's centre as the map measures it, with Clay County, Clinton County, Jackson 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.
Consider what one year asks of a system in Johnson County: a cooling season measured at 1,446 degree days, a heating season at 4,786, 37.7 days of serious heat and 96.3 freezing nights, and 38.34 inches of precipitation working on every outdoor unit through all of it. No single figure is remarkable; the combination is the county's climate, and it is the combination a system has to survive for fifteen or twenty years. The service patterns described on this page are that arithmetic, playing out across 474 square miles of housing.
Johnson County is a county of distinct communities rather than one continuous town: Overland Park, Olathe, Shawnee and Lenexa are among the 5 places on its record, each with its own building era and its own stock of systems. Position plays its part as well — the county sits southwest of the Kansas City metro's centre, so its communities meet the Kansas City metro's weather at slightly different distances from the centre — but it is the place list that a service diary follows, name by name, through the year.
The growth figures deserve their own reading in Johnson County. 23.5% of the Kansas City 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 51.3% 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.
One way to hold Johnson County in mind is as the local layer of a wider dataset. Above it sits the Kansas City metro, with its Census housing profile and its NOAA station at LEES SUMMIT MUNI AP, MO US. At this level sit the county's own numbers — 474 square miles, 13 neighbouring counties, 32 ZIP codes, 5 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 197,199
Population 143,720
Population 68,175
Population 57,986
Population 33,844
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 Johnson County and the Kansas City 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