Forests: Indicates lands owned and managed by the U.S. Forest Service, including all National Forests and Grasslands boundaries. Precipitation: Total inches of precipitation measured over the summer months—June, July, and August—organized by climate division (NOAA). Temperature: Single-season average temperature in the summer months, organized by climate division (NOAA). Heat Anomaly: Difference between a division’s single-summer average temperature and its typical summer temperature, as determined by averaging measurements from 1901 to 2000 (NOAA).