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Weather & Climate
Hillsboro, Illinois, United States
Overview
Climate data and monthly weather averages for Hillsboro.
Key Metrics
Annual Avg
12.4°C
Summer Avg
24.2°C
Winter Avg
-0.4°C
Record High
42.5°C
Record Low
-24.2°C
Annual Precipitation
1104.2 mm
Avg Humidity
77%
Summer Humidity
75%
Winter Humidity
82%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 20° | -1.9° | -24.2° | 65.7 | 83% | 60 | 61.9 |
| Feb | 22.4° | -0.2° | -24.2° | 62.7 | 81% | 77 | 61.4 |
| Mar | 26° | 6.2° | -15.1° | 86.5 | 79% | 115 | 61.1 |
| Apr | 29.4° | 12.8° | -6.5° | 117.6 | 76% | 149 | 58.4 |
| May | 32° | 18.2° | 0.3° | 125.2 | 78% | 173 | 62.1 |
| Jun | 40.9° | 23.1° | 4.9° | 117 | 78% | 192 | 52.5 |
| Jul | 42.5° | 25.1° | 10.4° | 102 | 75% | 198 | 33.1 |
| Aug | 39.2° | 24.3° | 9.6° | 92.4 | 73% | 175 | 43.9 |
| Sep | 37.1° | 20.5° | 2.8° | 78.3 | 71% | 142 | 55.2 |
| Oct | 33.1° | 13.3° | -4.1° | 98 | 72% | 102 | 53.7 |
| Nov | 26° | 6.4° | -12.6° | 82.8 | 77% | 68 | 56.9 |
| Dec | 21.2° | 0.8° | -18.9° | 76 | 82% | 51 | 70 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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