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Weather & Climate
Jasper County, Illinois, United States
Overview
Climate data and monthly weather averages for Jasper County.
Key Metrics
Annual Avg
12.3°C
Summer Avg
23.9°C
Winter Avg
-0.3°C
Record High
42.8°C
Record Low
-27.7°C
Annual Precipitation
1162.9 mm
Avg Humidity
78%
Summer Humidity
76%
Winter Humidity
83%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 20.1° | -1.7° | -27.7° | 75 | 84% | 58 | 63.1 |
| Feb | 22.4° | -0.1° | -22.8° | 65.8 | 82% | 75 | 61.4 |
| Mar | 26.5° | 6.2° | -15.4° | 96.1 | 80% | 114 | 60.9 |
| Apr | 29.2° | 12.7° | -6.2° | 120.6 | 77% | 148 | 60 |
| May | 31.6° | 18.2° | -0.2° | 125.5 | 79% | 172 | 58.9 |
| Jun | 40.8° | 22.9° | 2.8° | 125.4 | 78% | 192 | 52.3 |
| Jul | 42.8° | 24.7° | 9.7° | 111 | 77% | 195 | 36.4 |
| Aug | 39.9° | 24° | 9.5° | 81.5 | 74% | 174 | 41.5 |
| Sep | 35.7° | 20.4° | 3.6° | 78.9 | 72% | 140 | 58.6 |
| Oct | 33.1° | 13.3° | -3.9° | 106 | 73% | 101 | 52.8 |
| Nov | 26.1° | 6.3° | -13.4° | 91.5 | 78% | 67 | 56.2 |
| Dec | 21.4° | 0.8° | -18.1° | 85.6 | 84% | 49 | 64.9 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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