Decatur, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Decatur, a village in Van Buren County, Michigan.
Tonight
55°F
Mostly Cloudy then Showers And Thunderstorms Likely
A chance of rain showers between 2am and 5am, then showers and thunderstorms likely. Mostly cloudy. Low around 55, with temperatures rising to around 58 overnight. East wind 6 to 9 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Decatur
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Mostly Cloudy then Showers And Thunderstorms Likely | 6 to 9 mph E | 65% |
| Saturday | 73°F | Showers And Thunderstorms | 10 mph SE | 96% |
| Saturday Night | 59°F | Showers And Thunderstorms | 3 to 7 mph SSE | 87% |
| Sunday | 70°F | Rain Showers Likely | 5 to 12 mph NE | 69% |
| Sunday Night | 49°F | Chance Rain Showers | 8 to 13 mph NE | 52% |
| Monday | 65°F | Chance Rain Showers | 13 mph ENE | 35% |
| Monday Night | 46°F | Chance Rain Showers then Mostly Cloudy | 9 to 14 mph ENE | 32% |
| Tuesday | 65°F | Partly Sunny then Chance Rain Showers | 9 to 13 mph ENE | 26% |
| Tuesday Night | 47°F | Chance Rain Showers | 6 to 13 mph NE | 26% |
| Wednesday | 65°F | Slight Chance Rain Showers then Partly Sunny | 7 to 10 mph NE | 17% |
| Wednesday Night | 48°F | Mostly Cloudy | 3 to 10 mph NE | 9% |
| Thursday | 68°F | Partly Sunny | 3 to 8 mph NNE | 5% |
| Thursday Night | 49°F | Mostly Cloudy | 1 to 8 mph NNE | 5% |
| Friday | 71°F | Mostly Sunny | 2 to 7 mph NNE | 7% |
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 Sep 19, 2026.