US Geography / US Weather / Wisconsin Weather / Janesville |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 26 | 30 | 44 | 58 | 70 | 80 | 84 | 80 | 74 | 62 | 46 | 31 |
| Avg. Low | 8 | 12 | 24 | 36 | 46 | 57 | 61 | 58 | 50 | 38 | 28 | 15 |
| Mean | 18 | 22 | 34 | 47 | 58 | 68 | 74 | 70 | 62 | 51 | 37 | 24 |
| Avg. Precip. | 1.3 in | 1.1 in | 2.3 in | 3.1 in | 3.1 in | 3.8 in | 3.9 in | 4.0 in | 4.0 in | 2.4 in | 2.5 in | 1.8 in |
Degrees in Fahrenheit
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