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Weather & Climate
Washtenaw County, Michigan, United States
Overview
Available climate summaries for Washtenaw County. Origins and reference periods are unverified; stored values may include AI estimates. Treat these as estimates until independently verified.
Key Metrics
Annual Avg
8.8°C
Summer Avg
21.2°C
Winter Avg
-4°C
Record High
37.3°C
Record Low
-28.4°C
Annual Precipitation
876.9 mm
Avg Humidity
79%
Summer Humidity
73%
Winter Humidity
87%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 15.1° | -5.3° | -27.8° | 53.6 | 88% | 49 | 64.7 |
| Feb | 18.5° | -4.5° | -28.4° | 54.3 | 86% | 68 | 65.2 |
| Mar | 27.7° | 1.1° | -24.5° | 57 | 80% | 110 | 72.1 |
| Apr | 26.4° | 7.6° | -14.9° | 79.8 | 76% | 140 | 59.8 |
| May | 31.4° | 14.2° | -4.2° | 103.2 | 77% | 169 | 61 |
| Jun | 35.8° | 19.5° | 2.6° | 87 | 76% | 185 | 48.7 |
| Jul | 37.3° | 22.4° | 5.6° | 83.7 | 72% | 193 | 42.4 |
| Aug | 37.2° | 21.8° | 7.7° | 82.8 | 71% | 165 | 39.6 |
| Sep | 34.6° | 17.7° | 2.5° | 77.1 | 73% | 128 | 49.4 |
| Oct | 31.2° | 10.3° | -4° | 78.1 | 77% | 86 | 56.9 |
| Nov | 24.1° | 3.5° | -13.2° | 63.6 | 82% | 53 | 61 |
| Dec | 18° | -2.2° | -20.6° | 56.7 | 88% | 38 | 61.7 |
Data sources
Estimates and unverified origins
Oyster List climate data - Climate origins are unverified. Available methods include historical APIs and AI estimates; stored rows do not identify the original dataset, reference period, or model for each value. Treat these summaries as estimates until independently verified. Record updated 2026-03-22.
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