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Weather & Climate
Saint Clair County, Michigan, United States
Overview
Climate data and monthly weather averages for Saint Clair County.
Key Metrics
Annual Avg
8.6°C
Summer Avg
20.4°C
Winter Avg
-3.5°C
Record High
34.5°C
Record Low
-30°C
Annual Precipitation
825.9 mm
Avg Humidity
79%
Summer Humidity
75%
Winter Humidity
86%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 13.1° | -4.8° | -25° | 55.5 | 87% | 43 | 68.1 |
| Feb | 16.5° | -4.4° | -30° | 51.5 | 85% | 63 | 66.2 |
| Mar | 25.2° | 0.5° | -22.1° | 54.6 | 79% | 107 | 70.5 |
| Apr | 24.8° | 6.7° | -10.1° | 73.2 | 75% | 141 | 64.9 |
| May | 30.7° | 12.9° | -2.9° | 85.3 | 76% | 171 | 67 |
| Jun | 32.8° | 18.4° | 3.2° | 78.3 | 76% | 188 | 47.4 |
| Jul | 33° | 21.7° | 8.7° | 74.4 | 75% | 193 | 41.3 |
| Aug | 34.5° | 21.2° | 10° | 76.6 | 75% | 166 | 43.6 |
| Sep | 32.3° | 17.7° | 3.7° | 73.5 | 75% | 129 | 50.6 |
| Oct | 30.3° | 10.8° | -2° | 74.4 | 78% | 87 | 68.3 |
| Nov | 22° | 4.3° | -12.6° | 66.3 | 81% | 53 | 69.8 |
| Dec | 16.5° | -1.4° | -21.9° | 62.3 | 86% | 39 | 62 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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