September, or early October for Halloween atmosphere without peak-weekend crowds. Destination Salem recommends September for pleasant fall weather, smaller crowds than peak October, early Haunted Happenings events, and the Salem Literary Festival. First-timers wanting full seasonal museum access are directed to April–August
| Month | High (°F) | Low (°F) | Notes |
|---|---|---|---|
| Jan | 36 | 23 | crisp & changeable |
| Feb | 38 | 24 | crisp & changeable |
| Mar | 44 | 30 | crisp & changeable |
| Apr | 54 | 40 | cool & changeable |
| May | 64 | 50 | mild & changeable |
| Jun | 73 | 59 | warm & changeable |
| Jul | 79 | 66 | warm & changeable |
| Aug | 78 | 65 | warm & changeable |
| Sep | 72 | 59 | mild & changeable |
| Oct | 61 | 50 | mild & changeable |
| Nov | 50 | 38 | cool & changeable |
| Dec | 42 | 30 | crisp & changeable |