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Accumulated Growing Degree Days, Continental United States, 1981 - Current Year

posted on 22.04.2021, 21:41 by USA National Phenology Network
The USA National Phenology Network has available a series of gridded products enabling researchers to analyze daily Accumulated Growing Degree Days (AGDD) from 2016 through the current year, and compare these values to the 1981-2010 normals. Heat accumulation is commonly used as a way of predicting the timing of phenological transitions in plants and animals. Products generated by the USA-NPN begin accumulation on January 1 and use either a 32F or 50F base temperature.

The data are accessible via the USA-NPN Visualization Tool ( and the USA-NPN Geoserver (user access facilitated by the Geoserver Request Builder:

For all inquiries regarding this dataset, please contact the USA-NPN. This data is subject to the USA-NPN's Data Use Policy.


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