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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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.