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Weather & Climate
Byron, Illinois, United States
Overview
Climate data and monthly weather averages for Byron.
Key Metrics
Annual Avg
9.2°C
Summer Avg
22.1°C
Winter Avg
-4.7°C
Record High
40.6°C
Record Low
-38.6°C
Annual Precipitation
965.8 mm
Avg Humidity
79%
Summer Humidity
76%
Winter Humidity
86%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 14.9° | -6.3° | -38.6° | 40.9 | 87% | 56 | 58.3 |
| Feb | 19.1° | -4.6° | -28.1° | 45.9 | 84% | 77 | 69.5 |
| Mar | 26° | 2.3° | -24.6° | 62 | 79% | 116 | 64 |
| Apr | 28.8° | 9.1° | -8.4° | 92.1 | 75% | 141 | 60.8 |
| May | 33.2° | 15.3° | -3.2° | 114.7 | 77% | 172 | 58.9 |
| Jun | 36.9° | 20.9° | 3.8° | 123 | 77% | 185 | 55.4 |
| Jul | 40.6° | 23.1° | 7.8° | 103.2 | 76% | 194 | 38.4 |
| Aug | 38.1° | 22.2° | 7.4° | 103.9 | 74% | 169 | 35.6 |
| Sep | 35.6° | 18.1° | 0.9° | 89.1 | 74% | 131 | 46.9 |
| Oct | 30.6° | 10.4° | -8° | 80.3 | 76% | 89 | 54.8 |
| Nov | 23.2° | 3.4° | -16° | 56.1 | 80% | 57 | 57.6 |
| Dec | 19.9° | -3.3° | -29.6° | 54.6 | 87% | 44 | 63.1 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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