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How to Manage Pests

Run Models and Calculate Degree-Days

Our degree-day calculator has two branches. You can run preset models as recommended in our pest management guidelines. Or, you can specify thresholds and method of calculation to calculate any degree-days. Weather data for the calculations may come from the UC IPM database for California, a file you supply, or data you enter online. | Acknowledgments |

Run models
Calculate degree-days

Run models—using degree-days, as recommended by UC Cooperative Extension

Select an organism and preset thresholds

Calculate degree-days—specify thresholds

Specify thresholds and method of calculation

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

Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2016 The Regents of the University of California. All rights reserved.

For noncommercial purposes only, any Web site may link directly to this page. FOR ALL OTHER USES or more information, read Legal Notices. Unfortunately, we cannot provide individual solutions to specific pest problems. See our Home page, or in the U.S., contact your local Cooperative Extension office for assistance.

Agriculture and Natural Resources, University of California

Accessibility   /WEATHER/ddretrievetext.html revised: June 21, 2016. Contact webmaster.