Harman US

St. Charles, MI Weather & Growing Conditions

Overnight
51°F
Chance Light Rain
A chance of rain. Mostly cloudy. Low around 51, with temperatures rising to around 54 overnight. East northeast wind around 7 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast

WhenTempForecastWindPrecip
Overnight 51°F Chance Light Rain 7 mph ENE 44%
Saturday 66°F Showers And Thunderstorms Likely 3 to 8 mph ESE 76%
Saturday Night 54°F Showers And Thunderstorms Likely 5 to 9 mph E 71%
Sunday 68°F Chance Rain Showers 8 to 15 mph NE 33%
Sunday Night 50°F Chance Rain Showers then Mostly Cloudy 9 to 15 mph NE 28%
Monday 64°F Mostly Cloudy 12 to 16 mph NE 5%
Monday Night 46°F Mostly Cloudy 10 to 16 mph NE 5%
Tuesday 63°F Partly Sunny 12 to 16 mph NE 10%
Tuesday Night 48°F Chance Rain Showers 9 to 16 mph NE 33%
Wednesday 64°F Chance Rain Showers 13 mph NE 40%
Wednesday Night 48°F Chance Rain Showers then Mostly Cloudy 5 to 13 mph NE 28%
Thursday 67°F Partly Sunny 6 to 10 mph NNE 10%
Thursday Night 49°F Mostly Cloudy 3 to 10 mph NNE 8%
Friday 70°F Mostly Sunny 3 to 9 mph N 6%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for St. Charles, MI

Last spring frost
Apr 29
First fall frost
Oct 21
Growing season
175 days
Hardiness zone
6a

Explore more for St. Charles, MI: full frost dates · planting calendar · Michigan frost dates

Climate data from the nearest NOAA station, Saginaw #3, Mi (13.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.