US Geography / US Weather / Wisconsin Weather / Grafton |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 27° | 31° | 40° | 50° | 61° | 72° | 78° | 77° | 68° | 58° | 45° | 32° |
| Avg. Low | 11° | 15° | 25° | 34° | 44° | 54° | 60° | 58° | 52° | 41° | 30° | 17° |
| Mean | 18° | 24° | 34° | 44° | 54° | 64° | 68° | 68° | 61° | 50° | 38° | 25° |
| Avg. Precip. | 1.3 in | 1.0 in | 2.0 in | 3.0 in | 2.7 in | 3.1 in | 3.4 in | 3.8 in | 3.8 in | 2.4 in | 2.3 in | 2.0 in |
Degrees in Fahrenheit
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