Decatur, MI Weather & Growing Conditions
Tonight
62°F
Mostly Cloudy then Chance Rain Showers
A chance of rain showers after 4am. Mostly cloudy. Low around 62, with temperatures rising to around 64 overnight. South southeast wind around 14 mph, with gusts as high as 29 mph. Chance of precipitation is 40%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 62°F | Mostly Cloudy then Chance Rain Showers | 14 mph SSE | 36% |
| Wednesday | 70°F | Rain Showers Likely | 15 mph S | 71% |
| Wednesday Night | 48°F | Mostly Cloudy | 8 to 12 mph SW | 13% |
| Thursday | 59°F | Mostly Cloudy then Slight Chance Rain Showers | 13 mph SW | 18% |
| Thursday Night | 42°F | Chance Rain Showers | 2 to 8 mph WNW | 38% |
| Friday | 54°F | Chance Rain Showers | 3 to 10 mph NNW | 33% |
| Friday Night | 34°F | Slight Chance Rain Showers then Mostly Cloudy | 2 to 9 mph N | 20% |
| Saturday | 52°F | Partly Sunny | 2 to 8 mph NW | 14% |
| Saturday Night | 31°F | Partly Cloudy | 1 to 5 mph WSW | 3% |
| Sunday | 54°F | Slight Chance Rain Showers | 2 to 10 mph W | 21% |
| Sunday Night | 34°F | Slight Chance Rain Showers | 3 to 7 mph WNW | 21% |
| Monday | 59°F | Slight Chance Rain Showers then Mostly Sunny | 3 to 12 mph WSW | 16% |
| Monday Night | 38°F | Partly Cloudy | 8 mph WSW | 6% |
| Tuesday | 60°F | Mostly Sunny | 6 to 12 mph W | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Decatur, MI
Last spring frost
May 4
First fall frost
Oct 11
Growing season
158 days
Hardiness zone
6a
Explore more for Decatur, MI: full frost dates · planting calendar · Michigan frost dates
Climate data from the nearest NOAA station, Dowagiac 1 W, Mi (10.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.