St. Charles, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Charles, a city in Winona County, Minnesota.
Tonight
52°F
Rain Showers
Rain showers. Cloudy. Low around 52, with temperatures rising to around 55 overnight. East wind 6 to 13 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for St. Charles
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Rain Showers | 6 to 13 mph E | 95% |
| Wednesday | 55°F | Rain Showers | 9 to 14 mph SW | 87% |
| Wednesday Night | 45°F | Rain Showers | 15 mph W | 94% |
| Thursday | 49°F | Rain Showers | 13 to 16 mph N | 76% |
| Thursday Night | 37°F | Mostly Cloudy | 9 to 13 mph N | 10% |
| Friday | 46°F | Partly Sunny | 3 to 9 mph N | 0% |
| Friday Night | 31°F | Partly Cloudy | 2 mph NW | 1% |
| Saturday | 51°F | Mostly Sunny | 2 to 6 mph SW | 0% |
| Saturday Night | 36°F | Partly Cloudy | 5 to 9 mph W | 10% |
| Sunday | 57°F | Mostly Sunny | 9 mph W | 10% |
| Sunday Night | 38°F | Mostly Clear | 8 mph SW | 3% |
| Monday | 59°F | Mostly Sunny | 9 to 13 mph SW | 0% |
| Monday Night | 40°F | Mostly Clear | 9 mph W | 1% |
| Tuesday | 56°F | Sunny | 8 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov) for St. Charles (43.969, -92.059). Updated through the day.
Growing snapshot for St. Charles
Last spring frost
Apr 23
First fall frost
Oct 16
Growing season
175 days
Hardiness zone
4b
More local growing data for St. Charles: nearby ZIP 55972 weather · frost dates · planting calendar · Minnesota frost dates
Nearby towns & communities
Altura
Elba
Goodview
Homer
Lewiston
Minneiska
Minnesota City
Pickwick
Rollingstone
Stockton
Utica
Winona
Climate data from the nearest NOAA station, Minnesota City Dam 5, Mn (16.5 mi from St. Charles). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.