Black Hawk County heating and cooling, county by county: 566 square miles of Iowa lying east of the Waterloo metro's centre, 12 ZIP codes, and a climate record read from WATERLOO 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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Black Hawk County in one paragraph: 566 square miles in Iowa, 12 ZIP codes, a heating climate pressure read from the normals at WATERLOO MUNI AP, IA US, and housing that answers 6,714 heating degree days against 918 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.
Every climate number on this page comes from one record: the NOAA 1991-2020 normals at WATERLOO MUNI AP, IA US, the primary metro's station, read here for Black Hawk County. The record's shape is 6,714 heating degree days set against 918 cooling degree days, 36.29 inches of precipitation in an average year, 15.3 days reaching 90 degrees or above and 150.5 nights at or below freezing, with an average temperature of 49.0 degrees across the year.
Heating writes this county's HVAC calendar. With 6,714 heating degree days against 918 cooling degree days in the normals recorded at WATERLOO MUNI AP, IA US, the systems across Black Hawk County earn their keep in the cold half of the year: furnaces and heat pumps cycling through 150.5 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. Black Hawk County sits at 42.471132, -92.3076 on the map — the centroid of a county whose communities spread across 566 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.
12 ZIP codes reach into Black Hawk County's 566 square miles, among them 50613, 50623, 50626, 50634 — an average of 47.1 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.
Read the map around Black Hawk County and a working region appears: Bremer County, Grundy County are the neighbouring names at the head of its list of 2, 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.
There is a geography to Black Hawk County's seasons that the totals flatten. The county lies east of the Waterloo metro's centre, roughly 10 miles from the centre the record is measured against, and its 566 square miles do not meet a hot week or a cold snap in one voice: the ground nearer the metro and the ground at the county's far edge live the same 15.3 hot days and 150.5 freezing nights through different housing, fitted in different decades. One station record, one county, two ends of every season.
The county's place list tells its own story. Waterloo (66,947 residents) is the largest of the 6 communities the record names for Black Hawk County, with Cedar Falls (40,662 residents) behind it and Evansdale and Hudson 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 county's position frames its housing as well. Black Hawk County lies east of the Waterloo metro's centre, roughly 10 miles out, and the metro's era mix — 42.0% built before 1960, 28.8% between 1960 and 1979, median year 1966 — 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 Black Hawk County street belongs to is a local fact; that the bands exist, in these proportions, is the Census record this page is built on.
A reader who only had Black Hawk County's identifying figures would already know its shape: a county of 566 square miles in Iowa, 12 ZIP codes, 6 communities on the record, sitting east of the Waterloo 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 66,947
Population 40,662
Population 4,530
Population 2,614
Population 2,596
Population 2,170
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 Black Hawk County and the Waterloo 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