Free Online Databases
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.