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Allegan, MI Weather & Growing Conditions

Tonight
52°F
Showers And Thunderstorms
A chance of rain showers before 5am, then showers and thunderstorms. Mostly cloudy. Low around 52, with temperatures rising to around 55 overnight. East wind around 8 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.

7-day forecast

WhenTempForecastWindPrecip
Tonight 52°F Showers And Thunderstorms 8 mph E 76%
Saturday 68°F Showers And Thunderstorms 6 to 10 mph ESE 97%
Saturday Night 56°F Showers And Thunderstorms 2 to 6 mph E 90%
Sunday 67°F Rain Showers Likely 5 to 10 mph NE 62%
Sunday Night 48°F Chance Rain Showers 7 to 10 mph NE 38%
Monday 63°F Chance Rain Showers 10 mph ENE 28%
Monday Night 45°F Chance Rain Showers then Mostly Cloudy 7 to 13 mph ENE 28%
Tuesday 62°F Partly Sunny then Slight Chance Rain Showers 12 mph ENE 18%
Tuesday Night 46°F Slight Chance Rain Showers 6 to 12 mph NE 19%
Wednesday 64°F Slight Chance Rain Showers then Partly Sunny 6 to 9 mph NE 19%
Wednesday Night 47°F Mostly Cloudy 2 to 8 mph NE 9%
Thursday 67°F Partly Sunny 3 to 7 mph NNE 3%
Thursday Night 48°F Mostly Cloudy 1 to 6 mph NE 5%
Friday 70°F Mostly Sunny 1 to 6 mph NNE 7%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Allegan, MI

Last spring frost
May 4
First fall frost
Oct 15
Growing season
160 days
Hardiness zone
6a

Explore more for Allegan, MI: full frost dates · planting calendar · Michigan frost dates

Climate data from the nearest NOAA station, Allegan 5Ne, Mi (5.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.