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Weather & Climate
Monroe County, Illinois, United States
Overview
Climate data and monthly weather averages for Monroe County.
Key Metrics
Annual Avg
13°C
Summer Avg
24.8°C
Winter Avg
0.3°C
Record High
42.5°C
Record Low
-23°C
Annual Precipitation
1104.5 mm
Avg Humidity
76%
Summer Humidity
74%
Winter Humidity
81%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 20.8° | -1° | -22.2° | 62.9 | 82% | 65 | 54.9 |
| Feb | 24.3° | 0.6° | -23° | 63.3 | 80% | 78 | 53.9 |
| Mar | 26.8° | 6.9° | -14.4° | 93.3 | 78% | 117 | 50.3 |
| Apr | 30° | 13.3° | -6.1° | 120.6 | 76% | 151 | 50.3 |
| May | 33.3° | 18.7° | 1.1° | 129.6 | 78% | 175 | 54.7 |
| Jun | 42.4° | 23.7° | 6.9° | 106.8 | 77% | 193 | 41.8 |
| Jul | 42.5° | 25.8° | 12.1° | 101.4 | 74% | 195 | 27.2 |
| Aug | 40.6° | 25° | 9.6° | 92.7 | 71% | 173 | 33.3 |
| Sep | 38.4° | 21° | 3.2° | 80.4 | 70% | 143 | 47.9 |
| Oct | 34.1° | 13.8° | -3.9° | 93.9 | 71% | 107 | 42.6 |
| Nov | 27.2° | 6.9° | -10.9° | 85.5 | 76% | 72 | 49.2 |
| Dec | 21.9° | 1.4° | -18.1° | 74.1 | 82% | 56 | 56.5 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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