NOAA: Summer 2021 Ties For Hottest Summer on Record for US, and 8th Wettest During meteorological summer (June-August), the average temperature for the Lower 48 was 74.0°F, 2.6°F above average, nominally eclipsing the extreme heat of the Dust Bowl in 1936 by nearly 0.01°F and essentially tying 1936 for the warmest summer on record. A record 18.4 percent of the contiguous U.S. experienced record-warm temperatures for this season. For August, the contiguous U.S. average […] Weather WeatherBrains | September 13, 2021 0 Comments