Ann Arbor, MI Weather & Growing Conditions
Tonight
55°F
Mostly Cloudy then Chance Light Rain
A chance of rain after midnight. Mostly cloudy. Low around 55, with temperatures rising to around 57 overnight. East northeast wind 5 to 8 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Mostly Cloudy then Chance Light Rain | 5 to 8 mph ENE | 28% |
| Saturday | 67°F | Rain Showers | 5 to 9 mph E | 88% |
| Saturday Night | 58°F | Showers And Thunderstorms | 5 to 9 mph ESE | 80% |
| Sunday | 67°F | Showers And Thunderstorms Likely | 7 to 12 mph N | 61% |
| Sunday Night | 51°F | Chance Rain Showers then Mostly Cloudy | 12 mph NE | 45% |
| Monday | 63°F | Slight Chance Rain Showers | 10 to 14 mph NE | 21% |
| Monday Night | 48°F | Mostly Cloudy | 12 to 15 mph NE | 12% |
| Tuesday | 62°F | Mostly Cloudy then Slight Chance Rain Showers | 16 mph NE | 16% |
| Tuesday Night | 51°F | Chance Rain Showers | 15 mph NE | 46% |
| Wednesday | 62°F | Chance Rain Showers | 12 to 15 mph NE | 46% |
| Wednesday Night | 51°F | Chance Rain Showers | 8 to 12 mph NE | 43% |
| Thursday | 64°F | Partly Sunny | 10 mph NNE | 10% |
| Thursday Night | 51°F | Mostly Cloudy | 5 to 8 mph NNE | 10% |
| Friday | 68°F | Mostly Sunny | 6 to 9 mph NNE | 6% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Ann Arbor, MI
Last spring frost
May 8
First fall frost
Oct 4
Growing season
147 days
Hardiness zone
6a
Explore more for Ann Arbor, MI: full frost dates · planting calendar · Michigan frost dates
Climate data from the nearest NOAA station, Ann Arbor Muni Ap, Mi (0.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.