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Integrated Pest Management · Agriculture and Natural Resources

University of California

Weather, models, & degree-days

UC IPM offers interactive tools and models that can help you make pest management decisions based on conditions at your site.

California weather data

Current daily and hourly data from stations throughout California, plus long-term data for climate stations. PestCast research networks provide hourly and daily values from selected locations.

Station news | About the database | Western Regional Climate Center | CIMIS
Select from:
stations in (County)   Active stations only
stations in (Networks)  
station:  List

Pest and plant models (including UC-recommended degree-day models)

Videos: video presentation  Using degree-days to time insecticide applications

Degree-day calculator (Text-only version)

Specify the thresholds and method of calculation for any model. Use weather data from the UC IPM weather database, a file you supply, or data you enter online.

Using this calculator | About degree-days | video presentation Using degree-days



Enter lower Enter upper (optional)  
Method of calculation
Upper cutoff method (optional)