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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

WhenTempForecastWindPrecip
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

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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.