DC's springs (April to May) and falls (September to October) are mild and inviting. Summer can be extremely hot and humid, especially in July and August. Winters can be harsh, with temperatures hovering around freezing and snow storms sometimes shutting down the city, especially in January.
| Month | Temp (°C) | Rainfall (mm) | Humidity (%) | Sunshine (hours) |
| Jan | -3 - 6 | 86 | 5 | |
| Feb | -2 - 7 | 76 | 6 | |
| Mar | 2 - 12 | 91 | 7 | |
| Apr | 7 - 18 | 84 | 8 | |
| May | 12 - 24 | 94 | 9 | |
| Jun | 17 - 28 | 99 | 9 | |
| Jul | 20 - 31 | 112 | 9 | |
| Aug | 19 - 29 | 109 | 8 | |
| Sep | 15 - 26 | 94 | 8 | |
| Oct | 9 - 19 | 74 | 7 | |
| Nov | 3 - 13 | 66 | 5 | |
| Dec | -2 - 7 | 79 | 4 |