Early September (late August to early October is optimal per WeatherSpark tourism scoring; March–May also excellent). Early fall offers the best tourism score on WeatherSpark: comfortable temperatures (low 70s°F), lower humidity than summer, fewer crowds than peak spring/summer, and pleasant conditions for outdoor monument visits. Spring (March–May) is ideal for cherry blossoms and mild weather but draws the largest crowds
| Month | High (°F) | Low (°F) | Notes |
|---|---|---|---|
| Jan | 43 | 28 | crisp & changeable |
| Feb | 47 | 30 | cool & changeable |
| Mar | 56 | 36 | cool & changeable |
| Apr | 67 | 46 | mild & changeable |
| May | 76 | 56 | warm & changeable |
| Jun | 84 | 65 | warm & changeable |
| Jul | 88 | 70 | hot & changeable |
| Aug | 86 | 69 | hot & changeable |
| Sep | 80 | 63 | warm & changeable |
| Oct | 68 | 52 | mild & changeable |
| Nov | 56 | 40 | cool & mostly dry |
| Dec | 48 | 33 | cool & changeable |