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Weather & Climate
Winnebago, Illinois, United States
Overview
Climate data and monthly weather averages for Winnebago.
Key Metrics
Annual Avg
8.6°C
Summer Avg
21.6°C
Winter Avg
-5.5°C
Record High
40.7°C
Record Low
-40.3°C
Annual Precipitation
966.9 mm
Avg Humidity
80%
Summer Humidity
76%
Winter Humidity
87%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 13.4° | -7.1° | -40.3° | 38.4 | 88% | 56 | 58.6 |
| Feb | 19.1° | -5.5° | -29.1° | 42.8 | 85% | 77 | 71.9 |
| Mar | 25.7° | 1.6° | -26.9° | 60.1 | 80% | 116 | 63.6 |
| Apr | 28.1° | 8.3° | -10.3° | 93.3 | 76% | 141 | 62 |
| May | 33.1° | 14.7° | -3° | 108.5 | 77% | 172 | 57.5 |
| Jun | 36.4° | 20.4° | 3.8° | 129.3 | 77% | 185 | 52.2 |
| Jul | 40.7° | 22.8° | 7.2° | 104.2 | 76% | 194 | 36 |
| Aug | 38° | 21.7° | 6.7° | 107 | 75% | 169 | 38.5 |
| Sep | 34.5° | 17.5° | 0.6° | 93 | 76% | 131 | 49.4 |
| Oct | 30.1° | 9.9° | -7.7° | 80.3 | 77% | 89 | 56.4 |
| Nov | 22.7° | 2.8° | -16.8° | 56.1 | 81% | 57 | 56.3 |
| Dec | 19.1° | -4° | -30.9° | 53.9 | 88% | 44 | 64.8 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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