Plainwell, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Plainwell, a city in Allegan County, Michigan.
Tonight
62°F
Partly Cloudy then Slight Chance Rain Showers
A slight chance of rain showers after 5am. Partly cloudy. Low around 62, with temperatures rising to around 64 overnight. South southeast wind around 13 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.
7-day forecast for Plainwell
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 62°F | Partly Cloudy then Slight Chance Rain Showers | 13 mph SSE | 24% |
| Wednesday | 70°F | Rain Showers | 12 to 15 mph S | 93% |
| Wednesday Night | 48°F | Slight Chance Rain Showers then Mostly Cloudy | 7 to 12 mph SW | 20% |
| Thursday | 58°F | Chance Rain Showers | 9 to 13 mph SW | 41% |
| Thursday Night | 42°F | Chance Rain Showers | 2 to 8 mph W | 42% |
| Friday | 54°F | Chance Rain Showers | 2 to 9 mph NNW | 41% |
| Friday Night | 33°F | Chance Rain Showers then Mostly Cloudy | 2 to 8 mph N | 25% |
| Saturday | 52°F | Partly Sunny | 1 to 7 mph NW | 12% |
| Saturday Night | 31°F | Partly Cloudy | 0 to 5 mph WSW | 5% |
| Sunday | 55°F | Mostly Sunny then Slight Chance Rain Showers | 2 to 10 mph W | 22% |
| Sunday Night | 33°F | Slight Chance Rain Showers | 3 to 7 mph WNW | 22% |
| Monday | 60°F | Mostly Sunny | 3 to 12 mph W | 12% |
| Monday Night | 38°F | Partly Cloudy | 5 to 9 mph WSW | 5% |
| Tuesday | 61°F | Mostly Sunny | 5 to 13 mph W | 3% |
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 Nov 4, 2026.