A radiant barrier is required in climate zones 2-15. Manual describes each climate zone boundaries and list most California cities with its associated climate zone number. In climate zones 1, 2, 3, 4A, and 4B a vapor retarder is not required regardless of the use of exterior insulation growden (Gary Rowden) January 28, 2012, 4:10am For Example; Sacramento is Cl imate Zone 12, San Francisco is Climate Zone 3 and Lake Tahoe is Climate Zone 16. The following pages are a listing of the climate zones associated with several thousand specific California cities, towns and other locations.This information represents an abridged version of the Commission publication California Climate Zone Descriptions, which contains detailed survey definitions of the sixteen climate zones. Inland Northern and Central California with Some Ocean Influence Growing season: early Mar. The climate here is mild, and generally warm and temperate. The USDA plant hardiness map divides North America into 11 hardiness zones. The other three are Zone 7, called “Foothill-Digger Pine”; Zone 14, “Coastal Warm”; Zone 15, “Coastal Cool”; and Zone 17, “Marine.”. in climate zones 1, 11 -16; or R-30 minimum in climate zones 2 -10. ZONE 19: Thermal belts around Southern California's interior valleys. Periodic intrusions of marine air temper summer heat and winter cold (lows run from 26 degrees to 16 degrees F/-3 degrees to -9 degrees C). CALIFORNIA WEATHER ZONES. Alturas CALIFORNIA BUILDING CLIMATE ZONES South Lake Sacramento Fresno Bakersfield Barstow W E S 50 50 100 Miles SYSTEMS ASSESMENT & FACILITIES SITING DIVISION T:\Projects \CEC\Mexico\MX Border.apr VIEW: CZ Building B&W 8.5X11 LAYOUT:CZ Building B&W 8.5X11 ZONE 14. In a year, the rainfall is 527 mm | 20.7 inch. The Köppen-Geiger climate classification is Csc. § 150.2(a)1B . Like that of neighboring Zone 18, the climate in Zone 19 is little influenced by the ocean. Vapor barrier usually depends on the climate zone. You can use Sunset’s climate maps to identify the climate characteristics of a site during the site inventory process. Zone 1 is the coldest; zone … Of 24 climate zones defined in the Sunset Western Garden Book and the 20 zones defined by the United States Department of Agriculture (USDA), California has 20 and 16, respectively. Over a 20-year period,winter lows averaged from 22 to 17°F (–6 to –8°F).The all-time lows recorded by different weather stations in Zone 18 ranged from 22 to 7°F (–6 to –14°C). Natural gas is available for newly constructed buildings if a gas service line can be connected to the site without a gas m ain extension. Zone 9a: 20°F to 25°F: California City: Zone 8a: 10°F to 15°F: California Hot Springs: Zone 8a: 10°F to 15°F: California Pines: Zone 6a: -10°F to -5°F: Calimesa: Zone 9b: 25°F to 30°F: Calipatria: Zone 9b: 25°F to 30°F: Calistoga: Zone 9b: 25°F to 30°F: Callahan: Zone 8a: 10°F to 15°F: Callender: Zone … To find the planting zone for California that you live in, simply find the area on the map above that you live in and match the color of that area to the map legend to the right. to mid-Nov., with rain coming in the remaining months. The margins of all climate zones are inexact. The average temperature in Oakland is 14.6 °C | 58.2 °F. 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