US Geography / US Weather / Illinois Weather / Metropolis |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 41 | 46 | 57 | 68 | 77 | 85 | 88 | 87 | 81 | 70 | 57 | 46 |
| Avg. Low | 24 | 27 | 37 | 47 | 56 | 64 | 68 | 66 | 58 | 46 | 38 | 28 |
| Mean | 34 | 37 | 48 | 58 | 67 | 75 | 78 | 77 | 70 | 58 | 48 | 37 |
| Avg. Precip. | 3.3 in | 3.9 in | 4.9 in | 5.0 in | 4.9 in | 4.1 in | 4.3 in | 3.3 in | 3.7 in | 3.0 in | 4.3 in | 4.7 in |
Degrees in Fahrenheit
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