Climate - Cahokia - Illinois
| Jan | Feb | March | April | May | June | |
|---|---|---|---|---|---|---|
| Average high in °F | 38 | 44 | 55 | 67 | 76 | 84 |
| Average low in °F | 20 | 24 | 35 | 46 | 55 | 64 |
| Av. precipitation - inch | 2.17 | 2.48 | 3.66 | 3.86 | 3.86 | 3.7 |
| July | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|
| Average high in °F | 89 | 87 | 80 | 69 | 55 | 43 |
| Average low in °F | 68 | 66 | 58 | 47 | 35 | 26 |
| Av. precipitation - inch | 3.98 | 3.66 | 3.19 | 3.03 | 3.74 | 2.95 |
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Cahokia Climate Graph - Illinois Climate Chart
Totals and averages
| Annual average high temperature | 65.5 °F |
| Annual average low temperature | 45.4 °F |
| Average temperature | 55.5 °F |
| Average annual precipitation | 40.3 in. |