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Weather & Climate
Sanilac County, Michigan, United States
Overview
Climate data and monthly weather averages for Sanilac County.
Key Metrics
Annual Avg
8.3°C
Summer Avg
19.5°C
Winter Avg
-2.6°C
Record High
30.9°C
Record Low
-24.9°C
Annual Precipitation
837.7 mm
Avg Humidity
81%
Summer Humidity
77%
Winter Humidity
87%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 10.9° | -3.7° | -22.3° | 54.3 | 88% | 39 | 69.2 |
| Feb | 11.6° | -4.1° | -24.9° | 50.1 | 86% | 56 | 72.1 |
| Mar | 20.6° | -0.3° | -18.2° | 52.4 | 82% | 103 | 72.2 |
| Apr | 19.1° | 4.9° | -7.2° | 79.8 | 80% | 136 | 63.5 |
| May | 26.5° | 10.2° | -1.2° | 83.4 | 81% | 165 | 65.4 |
| Jun | 29.4° | 16.4° | 3.6° | 83.7 | 80% | 181 | 57.9 |
| Jul | 30.2° | 21° | 11° | 74.4 | 76% | 188 | 46 |
| Aug | 30.9° | 21.2° | 12.9° | 77.5 | 75% | 162 | 49.8 |
| Sep | 28.6° | 18° | 4.7° | 74.7 | 75% | 123 | 56.4 |
| Oct | 26.8° | 11.4° | 1° | 82.5 | 78% | 79 | 77.1 |
| Nov | 18.9° | 5.3° | -7.2° | 64.8 | 81% | 46 | 79.6 |
| Dec | 13.8° | -0.1° | -14.8° | 60.1 | 86% | 32 | 70.8 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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