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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