CLIMATE/TEMPERATURES
Average temperatures reflect those of a city centrally located in the region. Temperatures at the coast are often 5 or more degrees cooler than inland temperatures because of coastal breezes and fog, and farther inland, temperatures are often significantly warmer than central locations at the same elevation.
Cities for average temperatures: San Diego County: San Diego; Desert: Palm Springs; Orange County: Irvine; Inland Empire: San Bernardino; Los Angeles County: Los Angeles; Central Coast: San Luis Obispo; Central Valley: Merced; San Francisco Bay Area: San Francisco; Gold Country: Sacramento; High Sierra: Truckee; North Coast: Arcata; Shasta Cascade: Redding