Chelsea, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Chelsea, a city in Washtenaw County, Michigan.
Tonight
54°F
Mostly Cloudy then Chance Light Rain
A chance of rain after midnight. Mostly cloudy. Low around 54, with temperatures rising to around 56 overnight. East northeast wind 3 to 7 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Chelsea
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Mostly Cloudy then Chance Light Rain | 3 to 7 mph ENE | 29% |
| Saturday | 66°F | Rain Showers | 3 to 8 mph E | 92% |
| Saturday Night | 57°F | Showers And Thunderstorms | 3 to 8 mph SE | 82% |
| Sunday | 67°F | Rain Showers Likely | 5 to 10 mph NNE | 63% |
| Sunday Night | 50°F | Chance Rain Showers then Mostly Cloudy | 10 mph NE | 44% |
| Monday | 63°F | Slight Chance Rain Showers | 9 to 13 mph NE | 23% |
| Monday Night | 47°F | Mostly Cloudy | 12 mph NE | 11% |
| Tuesday | 62°F | Mostly Cloudy then Slight Chance Rain Showers | 14 mph NE | 16% |
| Tuesday Night | 50°F | Chance Rain Showers | 12 mph NE | 45% |
| Wednesday | 62°F | Chance Rain Showers | 12 mph NE | 45% |
| Wednesday Night | 50°F | Chance Rain Showers | 6 to 9 mph NE | 36% |
| Thursday | 64°F | Mostly Cloudy | 6 to 9 mph NNE | 9% |
| Thursday Night | 50°F | Mostly Cloudy | 3 to 7 mph NNE | 9% |
| Friday | 68°F | Mostly Sunny | 5 to 8 mph N | 7% |
Forecast source: National Weather Service (api.weather.gov) for Chelsea (42.311, -84.019). Updated through the day.
Growing snapshot for Chelsea
Last spring frost
Apr 30
First fall frost
Oct 12
Growing season
163 days
Hardiness zone
6a
More local growing data for Chelsea: nearby ZIP 48118 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Chelsea, Mi (1.4 mi from Chelsea). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.