Winn, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Winn, a community in Isabella County, Michigan.
Tonight
55°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Cloudy. Low around 55, with temperatures rising to around 57 overnight. East northeast wind around 7 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Winn
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Showers And Thunderstorms Likely | 7 mph ENE | 58% |
| Sunday | 71°F | Chance Rain Showers then Mostly Cloudy | 8 to 12 mph NE | 31% |
| Sunday Night | 47°F | Mostly Cloudy | 10 mph NE | 7% |
| Monday | 62°F | Mostly Cloudy | 10 to 15 mph ENE | 7% |
| Monday Night | 44°F | Mostly Cloudy | 8 to 14 mph ENE | 2% |
| Tuesday | 63°F | Partly Sunny | 8 to 16 mph ENE | 2% |
| Tuesday Night | 47°F | Mostly Cloudy | 10 to 16 mph ENE | 12% |
| Wednesday | 64°F | Chance Rain Showers | 15 mph ENE | 31% |
| Wednesday Night | 47°F | Chance Rain Showers then Mostly Cloudy | 7 to 14 mph ENE | 31% |
| Thursday | 67°F | Partly Sunny | 7 to 10 mph ENE | 6% |
| Thursday Night | 48°F | Mostly Cloudy | 2 to 9 mph NE | 7% |
| Friday | 71°F | Partly Sunny | 2 to 8 mph NE | 7% |
| Friday Night | 46°F | Partly Cloudy | 1 to 7 mph NE | 3% |
| Saturday | 73°F | Sunny | 1 to 6 mph NE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Winn (43.519, -84.901). Updated through the day.
Growing snapshot for Winn
Last spring frost
Apr 30
First fall frost
Oct 20
Growing season
171 days
Hardiness zone
5b
More local growing data for Winn: nearby ZIP 48896 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Central Michigan Univ, Mi (8 mi from Winn). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.