The climate zones are based on energy use, temperature, weather and other factors. They are basically a geographic area that has similar climatic characteristics. The Energy Commission originally developed weather data for each climate zone by using unmodified (but error-screened) data for a representative city and weather year (representative months from various years). The Energy Commission analyzed weather data from weather stations selected for (1) reliability of data, (2) currency of data, (3) proximity to population centers, and (4) non-duplication of stations within a climate zone.
The representative city for each climate zone (CZ) is:
|CZ 1: Arcata||CZ 5: Santa Maria||CZ 9: Pasadena||CZ13: Fresno|
|CZ 2: Santa Rosa||CZ 6: Los Angeles||CZ10: Riverside||CZ14: China Lake|
|CZ 3: Oakland||CZ 7: San Diego||CZ11: Red Bluff||CZ15: El Centro|
|CZ 4: Sunnyvale||CZ 8: El Toro||CZ12: Sacramento||CZ16: Mount Shasta|
There are two sets of Climate Zone data included in VSAT, the original and a massaged set. In the massage data, the dry bulb temp has been modified in an effort to give the file a better "average" across the entire zone. Because only dry bulb was adjusted, the humidity conditions are affected and therefore the massaged files are not preferred.
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.
Cities beginning with letters A-I
Cities beginning with letters J-Q
Cities beginning with letters R-Z