Climate zones across California
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. California has 58 counties in 7 zones.
2B
1 county
3B
25 counties
3C
14 counties
4B
8 counties
4C
2 counties
5B
6 counties
6B
2 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 California
- Anaheim
- Antioch
- Bakersfield
- Berkeley
- Burbank
- Carlsbad
- Chico
- Chula Vista
- Clovis
- Concord
- Corona
- Costa Mesa
- Daly City
- Downey
- East Los Angeles
- El Cajon
- El Monte
- Elk Grove
- Escondido
- Fairfield
- Fontana
- Fremont
- Fresno
- Fullerton
- Garden Grove
- Glendale
- Hayward
- Huntington Beach
- Inglewood
- Irvine
- Jurupa Valley
- Lancaster
- Long Beach
- Los Angeles
- Menifee
- Modesto
- Moreno Valley
- Murrieta
- Oakland
- Oceanside
- Ontario
- Orange
- Oxnard
- Palmdale
- Pasadena
- Pomona
- Rancho Cucamonga
- Rialto
- Richmond
- Riverside
- Roseville
- Sacramento
- Salinas
- San Bernardino
- San Buenaventura
- San Diego
- San Francisco
- San Jose
- San Mateo
- Santa Ana
- Santa Clara
- Santa Clarita
- Santa Maria
- Santa Rosa
- Simi Valley
- Stockton
- Sunnyvale
- Temecula
- Thousand Oaks
- Torrance
- Vacaville
- Vallejo
- Victorville
- Visalia
- West Covina
We also serve spray foam and insulation contractors in Gilroy, Hemet, Indio, Merced, Mission Viejo, Norwalk, Redding, Santa Barbara, Santa Cruz, Seaside, Yuba City. Start with the free audit above and we will map your service area, whichever town you work out of.
See where your company ranks in California.
Free, takes a few minutes, and no call is required.
Get My Free Market Visibility Audit