US Geography / US Weather / Massachusetts Weather / Chatham |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 36 | 36 | 42 | 50 | 58 | 67 | 74 | 74 | 68 | 58 | 50 | 41 |
| Avg. Low | 24 | 24 | 30 | 38 | 46 | 54 | 60 | 60 | 56 | 47 | 38 | 28 |
| Mean | 30 | 31 | 37 | 44 | 54 | 61 | 67 | 67 | 62 | 54 | 45 | 35 |
| Avg. Precip. | 3.7 in | 3.9 in | 3.8 in | 3.8 in | 3.8 in | 3.3 in | 3.3 in | 3.3 in | 3.7 in | 4.0 in | 4.3 in | 4.5 in |
Degrees in Fahrenheit
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