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Weather & Climate
Onarga, Illinois, United States
Overview
Climate data and monthly weather averages for Onarga.
Key Metrics
Annual Avg
10.8°C
Summer Avg
22.9°C
Winter Avg
-2.4°C
Record High
41.5°C
Record Low
-30.4°C
Annual Precipitation
1003.7 mm
Avg Humidity
78%
Summer Humidity
76%
Winter Humidity
84%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 18.4° | -3.8° | -30.4° | 54.9 | 85% | 58 | 64.1 |
| Feb | 20.2° | -2.2° | -26.7° | 52.9 | 83% | 76 | 62.6 |
| Mar | 27° | 4.3° | -22.3° | 68.2 | 79% | 114 | 65.6 |
| Apr | 28.4° | 11° | -6.5° | 97.2 | 75% | 145 | 63.4 |
| May | 33.2° | 16.9° | -2° | 112.5 | 76% | 171 | 59.8 |
| Jun | 41.3° | 21.9° | 2.8° | 116.1 | 77% | 188 | 51 |
| Jul | 41.5° | 23.8° | 8.8° | 105.4 | 76% | 195 | 42.1 |
| Aug | 37.4° | 23° | 7.9° | 93.9 | 74% | 172 | 33.4 |
| Sep | 38.1° | 19.2° | 3° | 83.1 | 72% | 138 | 49.5 |
| Oct | 31.6° | 11.9° | -7.6° | 89.3 | 73% | 97 | 54.9 |
| Nov | 25° | 4.9° | -12.4° | 66.3 | 78% | 64 | 61.6 |
| Dec | 20.6° | -1.1° | -24.8° | 63.9 | 85% | 48 | 67.6 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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