Washington County heating and cooling, county by county: 569 square miles of Iowa lying south of the Iowa City metro's centre, 7 ZIP codes, and a climate record read from IOWA CITY MUNI AP, IA 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 Washington County, Iowa — 569 square miles, 4 listed communities, a centroid south of the Iowa City metro's centre. Its climate record, from IOWA CITY MUNI AP, IA US, sets a heating pressure on its systems. TempReach USA publishes the homework and routes the call; an independent local HVAC technician serving the county does the work.
Climate on this page is not a national average wearing a county's name. It is the specific record at IOWA CITY MUNI AP, IA US: 51.0 degrees as the average temperature, 35.68 inches of precipitation, 19.0 hot days and 135.4 freezing nights in the average year, 6,114 heating degree days against 1,045 cooling degree days. Washington County — 569 square miles, 7 ZIP codes, 4 listed communities — lives inside that record, and its heating and cooling systems are sized, serviced and replaced inside it too.
Read the climate record and the county's pressure names itself. Heating degree days outnumber cooling degree days at IOWA CITY MUNI AP, IA US, and the lived version of that statistic is a housing stock whose furnaces and heat pumps run the long season while its cooling takes the short one. Across Washington County's 569 square miles — from Washington to the county's edge communities — the pattern repeats: systems sized for the cold, maintained for the cold, and replaced, when their time comes, with the cold in mind first.
One more county fact belongs in the record: position. Washington County sits at 41.329401, -91.725052 on the map — the centroid of a county whose communities spread across 569 square miles of Iowa. 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 Washington County's ZIP codes: 7 codes across 569 square miles works out to 81.3 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 south of the Iowa 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.
Neighbouring counties are the honest context for Washington County's figures. Its 569 square miles sit inside a wider spread of county ground — Johnson County are among the 1 neighbours on its record — and its position south of the Iowa City metro's centre places it on its own side of that spread. A system near the county's edge may be closer to a neighbouring county's centre than to its own; the pages are organised by county because the data is, and the links between them carry the rest of the picture.
The precipitation figure earns its place in Washington County's record: 35.68 inches a year at IOWA CITY MUNI AP, IA 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 7 ZIP codes cycling between wet and dry in a way that shows up in crawl spaces and condensate lines. Set beside 19.0 hot days and 135.4 freezing nights, it completes the picture of what the county's equipment actually lives in.
The county's place list tells its own story. Washington (7,314 residents) is the largest of the 4 communities the record names for Washington County, with Wellman (1,539 residents) behind it and Riverside and Keota further down the list. A technician working this county works all of those places in a single week, and the systems change character with the address: the era a community was built in decides whether the call is about an ageing furnace, a condenser at the end of its summers, or ductwork that predates the equipment it now serves.
The housing behind Washington County's systems is the Iowa City metro's housing, read at county scale. The largest single share of the metro's homes was built since 2000 — 33.6% of the stock — with 41.7% of homes predating 1980 and 33.6% arriving since 2000, around a median build year of 1988. 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.
A reader who only had Washington County's identifying figures would already know its shape: a county of 569 square miles in Iowa, 7 ZIP codes, 4 communities on the record, sitting south of the Iowa City metro's centre. What the figures cannot say alone is how the ground feels to work — the drives between calls, the mix of decades in the housing, the season that runs taller — and that is what the rest of this page is for, section by section.
City pages carry the metro-wide homework — housing eras, the problem ranking, services in depth. This county sits inside their coverage.
Population 7,314
Population 1,539
Population 1,040
Population 819
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 Washington County and the Iowa 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