US Geography / US Weather / Illinois Weather / Cairo |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 40 | 46 | 57 | 68 | 78 | 86 | 90 | 88 | 81 | 71 | 57 | 45 |
| Avg. Low | 21 | 25 | 35 | 46 | 55 | 64 | 67 | 65 | 57 | 44 | 36 | 26 |
| Mean | 31 | 36 | 47 | 58 | 67 | 76 | 78 | 77 | 68 | 58 | 47 | 36 |
| Avg. Precip. | 2.9 in | 3.9 in | 5.3 in | 4.7 in | 5.4 in | 3.5 in | 4.5 in | 3.4 in | 3.5 in | 2.9 in | 4.3 in | 4.6 in |
Degrees in Fahrenheit
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