Decatur, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Decatur, a village in Van Buren County, Michigan.
This Afternoon
75°F
Mostly Sunny
Mostly sunny. High near 75, with temperatures falling to around 73 in the afternoon. South wind around 14 mph, with gusts as high as 28 mph.
7-day forecast for Decatur
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 75°F | Mostly Sunny | 14 mph S | 5% |
| Tonight | 62°F | Mostly Cloudy then Chance Rain Showers | 12 to 15 mph SSE | 36% |
| Wednesday | 70°F | Rain Showers Likely | 15 mph S | 70% |
| Wednesday Night | 48°F | Mostly Cloudy | 8 to 13 mph SW | 13% |
| Thursday | 58°F | Mostly Cloudy then Slight Chance Rain Showers | 13 mph SW | 17% |
| Thursday Night | 42°F | Chance Rain Showers | 2 to 8 mph WNW | 37% |
| Friday | 54°F | Chance Rain Showers | 3 to 10 mph NNW | 32% |
| Friday Night | 34°F | Slight Chance Rain Showers then Mostly Cloudy | 2 to 9 mph N | 19% |
| 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 | 3 to 10 mph W | 21% |
| Sunday Night | 33°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% |
Forecast source: National Weather Service (api.weather.gov) for Decatur (42.108, -85.975). Updated through the day.
Growing snapshot for Decatur
Last spring frost
May 4
First fall frost
Oct 11
Growing season
158 days
Hardiness zone
6a
More local growing data for Decatur: nearby ZIP 49045 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Dowagiac 1 W, Mi (10.5 mi from Decatur). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.