Decatur, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Decatur, a village in Van Buren County, Michigan.
Today
73°F
Showers And Thunderstorms
Showers and thunderstorms before 9am, then patchy fog and showers and thunderstorms between 9am and 11am, then patchy fog and showers and thunderstorms likely between 11am and 5pm, then patchy fog and showers and thunderstorms likely. Some of the storms could produce heavy rain. Mostly cloudy. High near 73, with temperatures falling to around 70 in the afternoon. Southeast wind 7 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast for Decatur
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Showers And Thunderstorms | 7 to 10 mph SE | 91% |
| Tonight | 61°F | Patchy Fog | 2 to 6 mph SSE | 87% |
| Sunday | 71°F | Chance Rain Showers | 3 to 12 mph N | 49% |
| Sunday Night | 49°F | Mostly Cloudy | 8 to 12 mph NE | 12% |
| Monday | 65°F | Mostly Cloudy | 12 mph ENE | 13% |
| Monday Night | 46°F | Mostly Cloudy | 8 to 12 mph NE | 10% |
| Tuesday | 64°F | Partly Sunny | 9 to 14 mph NE | 13% |
| Tuesday Night | 47°F | Slight Chance Rain Showers | 8 to 14 mph NE | 18% |
| Wednesday | 65°F | Chance Rain Showers | 12 mph NE | 31% |
| Wednesday Night | 48°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 12 mph NE | 16% |
| Thursday | 68°F | Partly Sunny | 5 to 9 mph NE | 3% |
| Thursday Night | 48°F | Mostly Cloudy | 2 to 8 mph NE | 3% |
| Friday | 72°F | Mostly Sunny | 2 to 8 mph NE | 3% |
| Friday Night | 48°F | Partly Cloudy | 2 to 7 mph NE | 3% |
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.