St. Charles, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Charles, a village in Saginaw County, Michigan.
Tonight
51°F
Light Rain Likely
Rain likely. Mostly cloudy. Low around 51, with temperatures rising to around 54 overnight. East northeast wind 5 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for St. Charles
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Light Rain Likely | 5 to 9 mph ENE | 56% |
| 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) for St. Charles (43.298, -84.148). Updated through the day.
Growing snapshot for St. Charles
Last spring frost
Apr 29
First fall frost
Oct 21
Growing season
175 days
Hardiness zone
6a
More local growing data for St. Charles: nearby ZIP 48655 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Birch Run
Bridgeport
Buena Vista
Burt
Chesaning
Frankenmuth
Freeland
Hemlock
Merrill
Oakley
Robin Glen-Indiantown
Saginaw
Shields
Zilwaukee
Climate data from the nearest NOAA station, Saginaw #3, Mi (13.1 mi from St. Charles). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.