Plainwell, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Plainwell, a city in Allegan County, Michigan.
Today
84°F
Sunny
Sunny, with a high near 84. South southwest wind 2 to 7 mph.
7-day forecast for Plainwell
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Sunny | 2 to 7 mph SSW | 0% |
| Tonight | 60°F | Mostly Clear | 2 to 6 mph SSW | 0% |
| Wednesday | 83°F | Chance Rain Showers then Chance Showers And Thunderstorms | 2 to 8 mph SW | 43% |
| Wednesday Night | 61°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 0 to 7 mph W | 85% |
| Thursday | 79°F | Showers And Thunderstorms | 1 to 6 mph SW | 85% |
| Thursday Night | 58°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 6 mph WNW | 54% |
| Friday | 83°F | Mostly Sunny | 0 to 5 mph WSW | 12% |
| Friday Night | 59°F | Mostly Clear | 0 to 5 mph WNW | 12% |
| Saturday | 84°F | Sunny | 1 to 9 mph SW | 10% |
| Saturday Night | 65°F | Chance Rain Showers | 2 to 8 mph SW | 27% |
| Sunday | 86°F | Chance Rain Showers | 5 to 13 mph SW | 27% |
| Sunday Night | 65°F | Chance Rain Showers | 5 to 12 mph SW | 44% |
| Monday | 84°F | Chance Rain Showers | 5 to 9 mph WSW | 44% |
| Monday Night | 64°F | Chance Showers And Thunderstorms | 3 to 8 mph WSW | 51% |
Forecast source: National Weather Service (api.weather.gov) for Plainwell (42.445, -85.642). Updated through the day.
Growing snapshot for Plainwell
Last spring frost
Apr 29
First fall frost
Oct 20
Growing season
173 days
Hardiness zone
6a
More local growing data for Plainwell: nearby ZIP 49080 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Gull Lake Biological Stn, Mi (11.2 mi from Plainwell). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.