St. Charles, MI Weather & Growing Conditions
Today
88°F
Sunny
Sunny, with a high near 88. Southwest wind 5 to 9 mph, with gusts as high as 18 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Sunny | 5 to 9 mph SW | 0% |
| Tonight | 61°F | Mostly Clear | 5 to 8 mph SSW | 0% |
| Wednesday | 86°F | Partly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph SW | 37% |
| Wednesday Night | 63°F | Chance Showers And Thunderstorms | 2 to 8 mph W | 82% |
| Thursday | 81°F | Rain Showers | 6 mph WNW | 82% |
| Thursday Night | 60°F | Chance Showers And Thunderstorms then Partly Cloudy | 1 to 5 mph SE | 36% |
| Friday | 86°F | Mostly Sunny | 1 to 5 mph SW | 12% |
| Friday Night | 62°F | Mostly Clear | 5 mph SW | 12% |
| Saturday | 88°F | Sunny | 5 to 13 mph SW | 3% |
| Saturday Night | 65°F | Mostly Clear then Chance Rain Showers | 5 to 12 mph SW | 30% |
| Sunday | 89°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 6 to 15 mph SW | 30% |
| Sunday Night | 66°F | Chance Showers And Thunderstorms | 6 to 14 mph WSW | 53% |
| Monday | 86°F | Chance Rain Showers | 9 mph WSW | 53% |
| Monday Night | 64°F | Chance Showers And Thunderstorms | 5 to 9 mph W | 47% |
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 Aug 4, 2026.