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Weather & Climate
Des Plaines, Illinois, United States
Overview
Climate data and monthly weather averages for Des Plaines.
Key Metrics
Annual Avg
9.4°C
Summer Avg
22.2°C
Winter Avg
-4.1°C
Record High
40.5°C
Record Low
-38.4°C
Annual Precipitation
981.6 mm
Avg Humidity
78%
Summer Humidity
73%
Winter Humidity
86%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 15.9° | -5.6° | -38.4° | 44 | 87% | 44 | 61.4 |
| Feb | 18.1° | -4.1° | -27.2° | 50.4 | 85% | 63 | 69.3 |
| Mar | 27° | 2.3° | -27° | 62.9 | 80% | 107 | 64.7 |
| Apr | 28.1° | 8.6° | -7.4° | 95.1 | 76% | 136 | 60.2 |
| May | 34.2° | 14.8° | -3.2° | 119.7 | 76% | 163 | 61.2 |
| Jun | 37.4° | 20.6° | 1.8° | 112.2 | 74% | 178 | 50.9 |
| Jul | 40.5° | 23.5° | 9.3° | 99.5 | 72% | 188 | 39.1 |
| Aug | 38° | 22.6° | 7.8° | 105.7 | 72% | 162 | 41 |
| Sep | 34.9° | 18.4° | 2.3° | 86.7 | 74% | 125 | 47 |
| Oct | 30.3° | 10.8° | -8° | 90.5 | 76% | 84 | 55.6 |
| Nov | 23.1° | 3.8° | -15.1° | 58.2 | 81% | 53 | 59.8 |
| Dec | 19.9° | -2.5° | -27.4° | 56.7 | 87% | 39 | 63.2 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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