CAHOKIA ST LOUIS AP, IL US
GHCN ID: USW00003960 · IL, US · 125.9 m elevation · Records 1997-2026 (29 years)
Primary station for Cahokia Heights, IL.
Monthly climate normals (1991-2020)
| Month | High | Low | Mean | Precip | Snow |
|---|---|---|---|---|---|
| January | 40.2°F | 24.1°F | 32.1°F | 2.46 in | — |
| February | 45.6°F | 27.6°F | 36.6°F | 1.96 in | — |
| March | 56.3°F | 36.0°F | 46.1°F | 3.27 in | — |
| April | 67.5°F | 45.5°F | 56.5°F | 4.48 in | — |
| May | 76.7°F | 56.5°F | 66.6°F | 4.84 in | — |
| June | 85.7°F | 64.7°F | 75.2°F | 4.36 in | — |
| July | 89.0°F | 68.8°F | 78.9°F | 3.70 in | — |
| August | 87.8°F | 66.1°F | 76.9°F | 3.68 in | — |
| September | 80.7°F | 57.1°F | 68.9°F | 3.36 in | — |
| October | 69.4°F | 46.1°F | 57.7°F | 3.07 in | — |
| November | 55.3°F | 35.9°F | 45.6°F | 3.34 in | — |
| December | 44.3°F | 28.6°F | 36.4°F | 2.32 in | — |