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Thus, it is important for builders and building officials to know which climate zones apply to their projects. The Energy Commission has developed an app to quickly and accurately show addresses and locations in relation to the geographic metes and bounds that determine California’s climate regions.
- California Building Climate Zones
Explore the California Building Climate Zones map to...
- California Building Climate Zones
The climate of California varies widely from hot desert to alpine tundra, depending on latitude, elevation, and proximity to the Pacific Coast. California's coastal regions, the Sierra Nevada foothills, and much of the Central Valley have a Mediterranean climate, with warmer, drier weather in summer and cooler, wetter weather in winter.
Explore the California Building Climate Zones map to understand the state's diverse climates and energy use variations.
Learn how the California Energy Code defines and uses 16 climate zones based on ZIP code boundaries for residential and non-residential buildings. Find out your climate zone and access maps, data, and resources from Energy Analytica.
Across California, average temperatures can range from 10°C (50°F) to 23°C (73°F), with inland areas experiencing broader extremes. Summer months in coastal areas see average temperatures between 15°C (59°F) and 28°C (82°F), while winter months average between 6°C (43°F) and 17°C (63°F).
The climate zone applicable to a building project is determined based on its physical location as it relates to the determinations of climate regions found in the Commission publication California Climate Zone Descriptions, which contains detailed survey definitions of the 16 climate zones.
California's climate is diverse, ranging from the arid deserts of the southeast to the cool, foggy coastlines of the north. The state predominantly experiences a Mediterranean climate, with wet winters and dry summers.
