US Geography / US Weather / Indiana Weather / Sullivan |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 34 | 38 | 51 | 64 | 74 | 84 | 86 | 84 | 78 | 67 | 54 | 38 |
| Avg. Low | 16 | 18 | 31 | 41 | 51 | 60 | 64 | 62 | 55 | 42 | 34 | 22 |
| Mean | 25 | 28 | 41 | 54 | 64 | 72 | 76 | 74 | 67 | 55 | 44 | 31 |
| Avg. Precip. | 2.1 in | 2.3 in | 3.7 in | 3.9 in | 4.5 in | 3.6 in | 4.9 in | 3.6 in | 3.4 in | 2.7 in | 3.6 in | 3.1 in |
Degrees in Fahrenheit
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