Decatur, MI Weather & Growing Conditions
Today
84°F
Sunny
Sunny, with a high near 84. South southwest wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Sunny | 7 mph SSW | 0% |
| Tonight | 60°F | Partly Cloudy | 5 mph SSW | 0% |
| Wednesday | 83°F | Chance Showers And Thunderstorms | 3 to 8 mph SW | 31% |
| Wednesday Night | 62°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 1 to 7 mph WSW | 84% |
| Thursday | 79°F | Showers And Thunderstorms | 1 to 6 mph WSW | 84% |
| Thursday Night | 59°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 64% |
| Friday | 82°F | Mostly Sunny | 0 to 5 mph SW | 9% |
| Friday Night | 60°F | Mostly Clear | 0 to 5 mph WSW | 9% |
| Saturday | 84°F | Mostly Sunny | 2 to 9 mph SW | 11% |
| Saturday Night | 65°F | Chance Rain Showers | 3 to 7 mph SSW | 26% |
| Sunday | 86°F | Chance Rain Showers then Mostly Sunny | 7 to 13 mph SW | 26% |
| Sunday Night | 66°F | Chance Showers And Thunderstorms | 6 to 13 mph SW | 42% |
| Monday | 85°F | Chance Rain Showers | 6 to 10 mph SW | 42% |
| Monday Night | 64°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 50% |
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 Aug 4, 2026.