Weather history and climate summary information is available for the following locations:
- Washington
Warmest December Days
The warmest December days in District of Columbia are:
| Washington, District of Columbia | 1998 | 78.1°F |
| Washington, District of Columbia | 1982 | 75°F |
| Washington, District of Columbia | 2001 | 75°F |
| Washington, District of Columbia | 2006 | 75°F |
| Washington, District of Columbia | 1984 | 75°F |
Coldest December Days
The coldest December days in District of Columbia were:
| Washington, District of Columbia | 1942 | 1.9°F |
| Washington, District of Columbia | 1983 | 3°F |
| Washington, District of Columbia | 1989 | 5°F |
| Washington, District of Columbia | 1962 | 10.4°F |
| Washington, District of Columbia | 2004 | 10.4°F |
Wettest December Days
The wettest single days in December occurred:
| Washington, District of Columbia | 1993 | 2.5 inches |
| Washington, District of Columbia | 1977 | 2.2 inches |
| Washington, District of Columbia | 2011 | 2.2 inches |
| Washington, District of Columbia | 1974 | 1.9 inches |
| Washington, District of Columbia | 1986 | 1.9 inches |