100-degree days and freezing days, decade by decade
At 656 stations reporting through every decade since 1950, freezing days fell from 117.1 a year in the 1950s to 107.2 in the 2020s. Days of 100°F or more were 5.3 in the 1950s, 3.7 in the 1960s and 5.7 in the 2020s.
100-degree days
Average days a year reaching 100°F
| 1950s | 5.3 | 117.1 |
| 1960s | 3.7 | 119.7 |
| 1970s | 3.7 | 117.0 |
| 1980s | 4.7 | 115.0 |
| 1990s | 3.8 | 110.9 |
| 2000s | 4.6 | 111.9 |
| 2010s | 5.0 | 110.2 |
| 2020s | 5.7 | 107.2 |