US Geography / US Weather / New Jersey / Williamstown |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 38 | 41 | 51 | 61 | 72 | 81 | 85 | 84 | 77 | 66 | 55 | 44 |
| Avg. Low | 22 | 24 | 32 | 41 | 51 | 60 | 65 | 64 | 57 | 45 | 37 | 27 |
| Mean | 31 | 34 | 42 | 52 | 62 | 71 | 76 | 74 | 67 | 56 | 46 | 36 |
| Avg. Precip. | 3.3 in | 2.9 in | 3.6 in | 3.9 in | 4.0 in | 3.6 in | 4.3 in | 4.3 in | 3.5 in | 3.3 in | 3.6 in | 3.6 in |
Degrees in Fahrenheit
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