CHICAGO OHARE INTL AP, IL US
GHCN ID: USW00094846 · IL, US · 200.6 m elevation · Records 1946-2026 (80 years)
Primary station for Addison, IL.
Monthly climate normals (1991-2020)
| Month | High | Low | Mean | Precip | Snow |
|---|---|---|---|---|---|
| January | 31.6°F | 18.8°F | 25.2°F | 1.99 in | 11.3 in |
| February | 35.7°F | 21.8°F | 28.8°F | 1.97 in | 10.7 in |
| March | 47.0°F | 31.0°F | 39.0°F | 2.45 in | 5.5 in |
| April | 59.0°F | 40.3°F | 49.7°F | 3.75 in | 1.3 in |
| May | 70.5°F | 50.6°F | 60.6°F | 4.49 in | — |
| June | 80.4°F | 60.8°F | 70.6°F | 4.10 in | — |
| July | 84.5°F | 66.4°F | 75.4°F | 3.71 in | — |
| August | 82.5°F | 65.1°F | 73.8°F | 4.25 in | — |
| September | 75.5°F | 57.1°F | 66.3°F | 3.19 in | — |
| October | 62.7°F | 45.4°F | 54.0°F | 3.43 in | 0.2 in |
| November | 48.4°F | 34.1°F | 41.3°F | 2.42 in | 1.8 in |
| December | 36.6°F | 24.4°F | 30.5°F | 2.11 in | 7.6 in |