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Free Online Databases

 

Evapotranspiration Data

 

This site contains monthly evapotranspiration data for both water balances and irrigation scheduling.  Information is downloadable by California ETo Zone

Online Weather Data

 

Both archived and real-time precipitation data from the official Cal Poly weather station is now available for download.

Irrigation Evaluation Data

 

This data is based on years of irrigation system evaluations throughout California, compiled in downloadable spreadsheets for six types of irrigation systems.