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Weather & Climate
Prophetstown, Illinois, United States
Overview
Climate data and monthly weather averages for Prophetstown.
Key Metrics
Annual Avg
10°C
Summer Avg
22.9°C
Winter Avg
-4°C
Record High
42.4°C
Record Low
-36.6°C
Annual Precipitation
942 mm
Avg Humidity
77%
Summer Humidity
74%
Winter Humidity
84%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 16.2° | -5.5° | -36.6° | 40 | 85% | 56 | 57.4 |
| Feb | 20° | -3.8° | -27° | 45.6 | 82% | 77 | 64 |
| Mar | 26.2° | 3.2° | -22.8° | 62.3 | 78% | 115 | 63.5 |
| Apr | 29.2° | 10.1° | -7.7° | 93.6 | 74% | 143 | 59.5 |
| May | 34° | 16.3° | -2.4° | 117.8 | 76% | 171 | 59.1 |
| Jun | 39.1° | 21.7° | 5.3° | 118.8 | 76% | 186 | 53 |
| Jul | 42.4° | 23.9° | 8.6° | 95.8 | 74% | 195 | 45.9 |
| Aug | 39° | 23° | 7.5° | 97 | 71% | 170 | 36 |
| Sep | 38.5° | 18.8° | 1.4° | 87.3 | 72% | 136 | 47.4 |
| Oct | 32° | 11° | -7° | 75.6 | 74% | 94 | 52.6 |
| Nov | 23.8° | 4° | -13.7° | 55.2 | 79% | 61 | 58.2 |
| Dec | 21.1° | -2.6° | -25.7° | 53 | 85% | 47 | 66.9 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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