Allegan, MI Weather & Growing Conditions
Overnight
52°F
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy. Low around 52, with temperatures rising to around 56 overnight. East wind around 7 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 52°F | Showers And Thunderstorms | 7 mph E | 77% |
| Saturday | 69°F | Showers And Thunderstorms | 7 mph ESE | 97% |
| Saturday Night | 58°F | Patchy Fog | 1 to 5 mph E | 85% |
| Sunday | 69°F | Chance Rain Showers then Mostly Cloudy | 3 to 9 mph NNE | 50% |
| Sunday Night | 48°F | Mostly Cloudy | 6 to 9 mph NE | 5% |
| Monday | 63°F | Mostly Cloudy | 10 mph ENE | 6% |
| Monday Night | 44°F | Mostly Cloudy | 6 to 10 mph ENE | 5% |
| Tuesday | 63°F | Partly Sunny | 8 to 13 mph ENE | 7% |
| Tuesday Night | 46°F | Mostly Cloudy then Slight Chance Rain Showers | 7 to 13 mph ENE | 17% |
| Wednesday | 64°F | Chance Rain Showers | 10 mph NE | 29% |
| Wednesday Night | 47°F | Slight Chance Rain Showers then Mostly Cloudy | 3 to 9 mph NE | 22% |
| Thursday | 67°F | Partly Sunny | 3 to 7 mph NE | 3% |
| Thursday Night | 47°F | Mostly Cloudy | 1 to 6 mph NE | 3% |
| Friday | 71°F | Mostly Sunny | 2 to 6 mph NE | 3% |
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.