Weather history and climate summary information is available for the following locations:
- Washington
Warmest May Days
The warmest May days in District of Columbia are:
| Washington, District of Columbia | 1941 | 98.2°F |
| Washington, District of Columbia | 2011 | 98.1°F |
| Washington, District of Columbia | 1991 | 97°F |
| Washington, District of Columbia | 1987 | 97°F |
| Washington, District of Columbia | 1962 | 96.3°F |
Coldest May Days
The coldest May days in District of Columbia were:
| Washington, District of Columbia | 1947 | 35.4°F |
| Washington, District of Columbia | 1945 | 36.3°F |
| Washington, District of Columbia | 1966 | 37.4°F |
| Washington, District of Columbia | 2005 | 37.9°F |
| Washington, District of Columbia | 1943 | 39°F |
Wettest May Days
The wettest single days in May occurred:
| Washington, District of Columbia | 1973 | 7.9 inches |
| Washington, District of Columbia | 2008 | 3.5 inches |
| Washington, District of Columbia | 1997 | 2.2 inches |
| Washington, District of Columbia | 1989 | 1.8 inches |
| Washington, District of Columbia | 1983 | 1.7 inches |