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Change in Growing Degree Days in the Contiguous 48 States, 1948–2020

Published by U.S. Environmental Protection Agency, Office of Air and Radiation | U.S. Environmental Protection Agency | Catalog Last Checked: August 03, 2026 at 04:43 AM | Dataset Last Updated: May 20, 2026 at 12:00 AM
This map shows trends in the total number of growing degree days per year at 305 weather stations . The color and size of the symbols represent percent change between 1948 and 2020, based on the long-term average rate of change. For more information: https://www.epa.gov/climatechange/science/indicators.

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