| O'Hare Monthly and
Yearly Normals (1971-2000) |
|||||||||||||
| Element | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °F | 29.6 | 34.7 | 46.1 | 58.0 | 69.9 | 79.2 | 83.5 | 81.2 | 73.9 | 62.1 | 47.1 | 34.4 | 58.3 |
| Low °F | 14.3 | 19.2 | 28.5 | 37.6 | 47.5 | 57.2 | 63.2 | 62.2 | 53.7 | 42.1 | 31.6 | 20.4 | 39.8 |
| Mean °F | 22.0 | 27.0 | 37.3 | 47.8 | 58.7 | 68.2 | 73.3 | 71.7 | 63.8 | 52.1 | 39.3 | 27.4 | 49.1 |
| Precip. (in) | 1.75 | 1.63 | 2.65 | 3.68 | 3.38 | 3.63 | 3.51 | 4.62 | 3.27 | 2.71 | 3.01 | 2.43 | 36.27 |
| Snow (in) | 11.3 | 8.3 | 6.0 | 1.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.3 | 1.8 | 8.7 | 38.0 |
| HDD | 1333 | 1075 | 858 | 513 | 232 | 49 | 6 | 9 | 112 | 401 | 759 | 1151 | 6498 |
| CDD | 0 | 0 | 1 | 9 | 48 | 159 | 279 | 233 | 91 | 10 | 0 | 0 | 830 |
