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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