VANDALIA, IL US
GHCN ID: USC00118781 · IL, US · 149.4 m elevation · Records 1899-2026 (127 years)
Primary station for Vandalia, IL.
Monthly climate normals (1991-2020)
| Month | High | Low | Mean | Precip | Snow |
|---|---|---|---|---|---|
| January | 36.9°F | 20.7°F | 28.8°F | 2.97 in | — |
| February | 41.9°F | 24.2°F | 33.0°F | 2.49 in | — |
| March | 52.7°F | 33.2°F | 42.9°F | 3.32 in | — |
| April | 65.1°F | 43.3°F | 54.2°F | 4.86 in | — |
| May | 74.9°F | 54.2°F | 64.6°F | 5.30 in | — |
| June | 83.7°F | 63.2°F | 73.5°F | 4.87 in | — |
| July | 86.8°F | 66.6°F | 76.7°F | 3.90 in | — |
| August | 85.9°F | 64.4°F | 75.2°F | 3.24 in | — |
| September | 79.6°F | 55.8°F | 67.7°F | 3.07 in | — |
| October | 67.7°F | 44.0°F | 55.8°F | 3.26 in | — |
| November | 53.7°F | 34.1°F | 43.9°F | 3.76 in | — |
| December | 41.5°F | 25.6°F | 33.6°F | 2.69 in | — |