Agencies / Databases:

• California Climate Data Archive (Western Regional Climate Center, Scripps Institution of Oceanography, California Energy Commission)
• California Weather Database (University of California : Integrated Pest Management)
• ClimateServices.gov
• National Climatic Data Center
• National Weather Service
• weather.gov
• Western Regional Climate Center

Publications:

• Climatological Data : California [restricted to CSU, Chico]
• California Climate Watch
• California Weather Forecasts and Summaries
• Northern California Climate Summaries (Western Regional Climate Center)

Historical California Climate Data

• California Climate Data Archive
• California Weather Database (UCDavis)
• Climatological Data [restricted to CSU, Chico]
• Historical Climate Information (Western Regional Climate Center)
• MyForecast.com (contains historical climate information) select city, then select almanac
• WorldClimate.com (contains historical weather averages)