Climate zones across Colorado
Climate zone shapes what insulation work homeowners ask about, so it shapes what a contractor should lead with. The number rises as the climate gets colder (1 is hot, 8 is subarctic). The letter shows moisture: A is humid, B is dry and C is marine. Colorado has 63 counties in 4 zones.
4B
5 counties
5B
33 counties
6B
12 counties
7
13 counties
Source: U.S. DOE and PNNL, Guide to Determining Climate Zone by County: Building America and IECC 2021 Updates (PNNL-33270). As of October 21, 2022.
Cities we cover in Colorado
- Arvada
- Aurora
- Boulder
- Centennial
- Colorado Springs
- Denver
- Fort Collins
- Greeley
- Highlands Ranch
- Lakewood
- Longmont
- Pueblo
- Thornton
- Westminster
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