Washtenaw County weather, town by town
8 places in Washtenaw County, Michigan, each with its own live forecast and radar, and where a station sits close enough, measured weather records.
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Measured at the NOAA stations serving these towns, daily records 1891 to 2026. Station extremes, not official state records.
Washtenaw County Weather Facts
Washtenaw County has 8 places on myweatherrock (5 cities, 2 villages, 1 census-designated places), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 105°F at Ann Arbor U Of Mich on July 24, 1934. The coldest night is -30°F at Ann Arbor Muni Ap on February 20, 2015. The wettest day brought 6.15 inches of rain at Chelsea on July 28, 2011. The biggest single-day snow measured 15.79 inches at Ann Arbor U Of Mich on December 1, 1974. Those are station measurements from NOAA's daily records, 1891 to 2026, not official state records. By area the largest place is Ann Arbor, about 28 square miles.
About Washtenaw County weather
The map on the Now tab shows every Washtenaw County town's current temperature from our own server, one dot per town. Tap any dot, or type a town above, for that town's full forecast.
What the weather is usually like
Across the 8 Washtenaw County towns with station normals, the warmest month is July, when the day usually reaches 84°F, and the coldest is January, when the night usually falls to 16°F. January is the wettest, with rain on about 15 days. January nights run from about 15°F in Manchester to 18°F in Barton Hills.
Means of the 1991 to 2020 station normals serving these towns, as published by NOAA; each town's page carries its own.
Where these numbers come from
- Current conditions and forecast: NOAA forecast grids decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
- Records: computed by myweatherrock from NOAA GHCN-Daily station records at the stations serving these towns. Measurements, not estimates.
- Warnings and alerts: the National Weather Service, passed through unchanged.
Washtenaw County weather records
Measured at the NOAA stations serving these towns, daily records 1891 to 2026. Station extremes, not official state records.
Common questions about Washtenaw County weather
- What is the hottest temperature recorded at a Washtenaw County station?
- 105°F at Ann Arbor U Of Mich on July 24, 1934, in the NOAA daily station records myweatherrock holds (1891 to 2026).
- What is the coldest temperature recorded at a Washtenaw County station?
- -30°F at Ann Arbor Muni Ap on February 20, 2015.
- What is the most rain a Washtenaw County station has measured in one day?
- 6.15 inches at Chelsea on July 28, 2011.
- What is the biggest one-day snowfall at a Washtenaw County station?
- 15.79 inches at Ann Arbor U Of Mich on December 1, 1974.
- How many Washtenaw County towns have a weather page here?
- 8: 5 cities, 2 villages, 1 census-designated places. Each page carries current conditions, the hourly timeline, the ten day outlook, radar, and where a station sits close enough, measured records.
- Where does the Washtenaw County forecast come from?
- NOAA forecast grids (the National Weather Service digital forecast, the National Blend of Models, HRRR and GFS) decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
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