Climate - Vandalia - Illinois
| Jan | Feb | March | April | May | June | |
|---|---|---|---|---|---|---|
| Average high in °F | 35 | 40 | 52 | 64 | 74 | 83 |
| Average low in °F | 18 | 23 | 32 | 43 | 53 | 62 |
| Av. precipitation - inch | 2.48 | 2.4 | 3.7 | 3.58 | 4.09 | 3.94 |
| July | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|
| Average high in °F | 87 | 86 | 79 | 67 | 53 | 40 |
| Average low in °F | 67 | 64 | 55 | 43 | 34 | 24 |
| Av. precipitation - inch | 3.62 | 2.8 | 2.95 | 2.83 | 3.7 | 2.76 |
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Vandalia Climate Graph - Illinois Climate Chart
Totals and averages
| Annual average high temperature | 63.3 °F |
| Annual average low temperature | 43.1 °F |
| Average temperature | 53.2 °F |
| Average annual precipitation | 38.9 in. |