US Geography / US Weather / Illinois Weather / Westchester |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 28 | 34 | 45 | 58 | 70 | 78 | 84 | 81 | 74 | 64 | 48 | 34 |
| Avg. Low | 12 | 17 | 28 | 38 | 47 | 57 | 62 | 61 | 54 | 42 | 31 | 18 |
| Mean | 21 | 25 | 37 | 48 | 58 | 68 | 74 | 72 | 64 | 54 | 40 | 27 |
| Avg. Precip. | 1.5 in | 1.4 in | 2.7 in | 3.6 in | 3.3 in | 3.8 in | 3.7 in | 4.3 in | 3.8 in | 2.4 in | 2.9 in | 2.5 in |
Degrees in Fahrenheit
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