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Weather & Climate
Delavan, Illinois, United States
Overview
Climate data and monthly weather averages for Delavan.
Key Metrics
Annual Avg
11°C
Summer Avg
23.3°C
Winter Avg
-2.5°C
Record High
42.3°C
Record Low
-31.1°C
Annual Precipitation
982.6 mm
Avg Humidity
77%
Summer Humidity
74%
Winter Humidity
83%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 18.1° | -4° | -31.1° | 52.1 | 84% | 59 | 59.3 |
| Feb | 20.2° | -2.3° | -26.7° | 50.4 | 82% | 77 | 63.3 |
| Mar | 26.5° | 4.4° | -22.1° | 67.6 | 78% | 116 | 66.8 |
| Apr | 28.5° | 11.2° | -6.7° | 97.5 | 75% | 146 | 60.8 |
| May | 34° | 17.1° | -1.4° | 114.1 | 76% | 173 | 56.7 |
| Jun | 41.7° | 22.2° | 5.2° | 110.1 | 77% | 190 | 50.4 |
| Jul | 42.3° | 24.3° | 9.9° | 100.8 | 74% | 198 | 37.5 |
| Aug | 39.9° | 23.5° | 7.9° | 92.1 | 72% | 173 | 33.7 |
| Sep | 39° | 19.5° | 2.3° | 85.5 | 71% | 140 | 43.8 |
| Oct | 32.2° | 11.9° | -8.4° | 87.4 | 73% | 98 | 53.5 |
| Nov | 25.2° | 5° | -12.8° | 63.6 | 78% | 65 | 58.4 |
| Dec | 20.9° | -1.2° | -25.3° | 61.4 | 84% | 49 | 70.1 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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