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Length of Growing Season, 1895–2023

Published by U.S. EPA Office of Air and Radiation (OAR) - Office of Atmospheric Programs (OAP) | U.S. Environmental Protection Agency | Metadata Last Checked: January 27, 2026 | Last Modified: 2016-08-02T00:00:00.000+00:00
This indicator looks at the impact of temperature on the length of the growing season in the contiguous 48 states, as well as trends in the timing of spring and fall frosts. For more information: https://www.epa.gov/climate-indicators.

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