Allegan, MI Weather & Growing Conditions
Overnight
62°F
Slight Chance Rain Showers
A slight chance of rain showers. Mostly cloudy. Low around 62, with temperatures rising to around 64 overnight. South wind around 12 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 62°F | Slight Chance Rain Showers | 12 mph S | 22% |
| Wednesday | 69°F | Rain Showers Likely | 9 to 13 mph SSW | 73% |
| Wednesday Night | 47°F | Cloudy then Slight Chance Rain Showers | 7 to 12 mph SW | 21% |
| Thursday | 55°F | Rain Showers Likely | 12 mph SW | 64% |
| Thursday Night | 39°F | Rain Showers Likely | 3 to 8 mph WNW | 64% |
| Friday | 50°F | Chance Rain Showers | 8 mph NNW | 42% |
| Friday Night | 32°F | Chance Rain Showers then Mostly Cloudy | 2 to 7 mph NNW | 40% |
| Saturday | 51°F | Mostly Sunny | 1 to 7 mph NW | 5% |
| Saturday Night | 32°F | Partly Cloudy | 0 to 3 mph W | 2% |
| Sunday | 54°F | Mostly Sunny then Slight Chance Rain Showers | 2 to 10 mph W | 17% |
| Sunday Night | 34°F | Slight Chance Rain Showers then Partly Cloudy | 1 to 7 mph W | 17% |
| Monday | 58°F | Mostly Sunny | 1 to 9 mph WSW | 5% |
| Monday Night | 39°F | Partly Cloudy | 7 mph WSW | 2% |
| Tuesday | 60°F | Mostly Sunny | 5 to 9 mph W | 8% |
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 Nov 4, 2026.