US Geography / US Weather / Iowa Weather / Williamsburg |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 27° | 34° | 46° | 61° | 72° | 81° | 85° | 82° | 75° | 64° | 47° | 32° |
| Avg. Low | 7° | 12° | 24° | 36° | 48° | 57° | 62° | 58° | 51° | 38° | 27° | 14° |
| Mean | 18° | 24° | 35° | 48° | 60° | 70° | 74° | 71° | 64° | 52° | 38° | 24° |
| Avg. Precip. | 1.0 in | 0.9 in | 2.3 in | 3.6 in | 4.3 in | 4.8 in | 4.4 in | 4.6 in | 4.3 in | 2.7 in | 2.3 in | 1.5 in |
Degrees in Fahrenheit
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