CAHOKIA, IL US
GHCN ID: USC00111160 · IL, US · 121.9 m elevation · Records 1969-2012 (43 years)
Primary station for Columbia, IL.
Monthly climate normals (1991-2020)
| Month | High | Low | Mean | Precip | Snow |
|---|---|---|---|---|---|
| January | 40.7°F | 22.0°F | 31.4°F | 2.67 in | 4.9 in |
| February | 46.0°F | 25.6°F | 35.8°F | 2.26 in | 3.7 in |
| March | 56.1°F | 34.7°F | 45.4°F | 3.55 in | 1.2 in |
| April | 67.5°F | 45.4°F | 56.5°F | 4.63 in | 0.3 in |
| May | 76.1°F | 56.0°F | 66.0°F | 4.80 in | — |
| June | 84.8°F | 64.9°F | 74.8°F | 4.30 in | — |
| July | 88.5°F | 68.9°F | 78.7°F | 5.02 in | — |
| August | 87.3°F | 66.7°F | 77.0°F | 3.09 in | — |
| September | 80.3°F | 58.6°F | 69.5°F | 3.35 in | — |
| October | 69.5°F | 46.0°F | 57.7°F | 3.04 in | — |
| November | 56.2°F | 35.3°F | 45.7°F | 3.33 in | 0.8 in |
| December | 45.1°F | 26.6°F | 35.8°F | 2.75 in | 2.9 in |