Allegan, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Allegan, 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 Allegan
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Sunny | 2 to 7 mph SSW | 0% |
| Tonight | 61°F | Partly Cloudy | 2 to 6 mph SSW | 0% |
| Wednesday | 82°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 2 to 8 mph SW | 48% |
| Wednesday Night | 61°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 0 to 7 mph WNW | 87% |
| Thursday | 79°F | Showers And Thunderstorms | 1 to 6 mph SW | 87% |
| Thursday Night | 57°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 6 mph WNW | 43% |
| Friday | 82°F | Mostly Sunny | 0 to 5 mph WSW | 8% |
| Friday Night | 59°F | Mostly Clear | 0 to 5 mph W | 8% |
| Saturday | 84°F | Sunny | 1 to 9 mph SW | 10% |
| Saturday Night | 65°F | Chance Rain Showers | 3 to 8 mph SW | 27% |
| Sunday | 85°F | Chance Rain Showers | 5 to 12 mph SW | 27% |
| Sunday Night | 65°F | Chance Rain Showers | 5 to 12 mph SW | 46% |
| Monday | 84°F | Chance Rain Showers | 5 to 9 mph WSW | 46% |
| Monday Night | 64°F | Chance Showers And Thunderstorms | 3 to 9 mph WSW | 52% |
Forecast source: National Weather Service (api.weather.gov) for Allegan (42.531, -85.839). Updated through the day.
Growing snapshot for Allegan
Last spring frost
May 4
First fall frost
Oct 15
Growing season
160 days
Hardiness zone
6a
More local growing data for Allegan: nearby ZIP 49010 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Allegan 5Ne, Mi (5.3 mi from Allegan). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.