St. Charles, MI Weather & Growing Conditions
Today
87°F
Sunny
Sunny, with a high near 87. Southwest wind 6 to 9 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Sunny | 6 to 9 mph SW | 0% |
| Tonight | 61°F | Mostly Clear | 8 mph SSW | 0% |
| Wednesday | 85°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 6 to 9 mph SW | 41% |
| Wednesday Night | 63°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 2 to 8 mph W | 82% |
| Thursday | 81°F | Showers And Thunderstorms | 2 to 6 mph W | 82% |
| Thursday Night | 60°F | Chance Showers And Thunderstorms then Partly Cloudy | 1 to 5 mph ESE | 35% |
| Friday | 85°F | Mostly Sunny | 1 to 5 mph SW | 10% |
| Friday Night | 62°F | Mostly Clear | 3 mph SW | 10% |
| Saturday | 88°F | Sunny | 3 to 12 mph SW | 3% |
| Saturday Night | 65°F | Mostly Clear then Chance Rain Showers | 5 to 10 mph SW | 29% |
| Sunday | 88°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 6 to 14 mph SW | 29% |
| Sunday Night | 66°F | Chance Showers And Thunderstorms | 6 to 13 mph WSW | 53% |
| Monday | 86°F | Chance Rain Showers | 8 mph W | 53% |
| Monday Night | 64°F | Chance Showers And Thunderstorms | 3 to 8 mph W | 47% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for St. Charles, MI
Last spring frost
May 1
First fall frost
Oct 15
Growing season
164 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, Owosso Wwtp, Mi (17.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.