St. Charles, KY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Charles, a city in Hopkins County, Kentucky.
This Afternoon
78°F
Mostly Sunny
Mostly sunny. High near 78, with temperatures falling to around 75 in the afternoon. South wind around 14 mph, with gusts as high as 22 mph.
7-day forecast for St. Charles
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 78°F | Mostly Sunny | 14 mph S | 2% |
| Tonight | 60°F | Showers And Thunderstorms | 7 to 13 mph S | 97% |
| Wednesday | 72°F | Chance Rain Showers then Partly Sunny | 5 to 9 mph SW | 40% |
| Wednesday Night | 46°F | Partly Cloudy | 3 mph WSW | 0% |
| Thursday | 70°F | Sunny | 2 to 6 mph SW | 0% |
| Thursday Night | 45°F | Partly Cloudy | 1 mph W | 1% |
| Friday | 64°F | Mostly Sunny | 1 to 7 mph NNW | 3% |
| Friday Night | 40°F | Mostly Cloudy | 5 mph NNW | 1% |
| Saturday | 58°F | Mostly Sunny | 5 mph NNW | 0% |
| Saturday Night | 35°F | Partly Cloudy | 1 mph NW | 1% |
| Sunday | 61°F | Sunny | 1 to 5 mph WNW | 6% |
| Sunday Night | 34°F | Mostly Clear | 2 mph W | 8% |
| Monday | 64°F | Sunny | 1 to 6 mph W | 4% |
| Monday Night | 37°F | Mostly Clear | 3 mph SW | 1% |
Forecast source: National Weather Service (api.weather.gov) for St. Charles (37.191, -87.550). Updated through the day.
Growing snapshot for St. Charles
Last spring frost
Apr 2
First fall frost
Nov 1
Growing season
212 days
Hardiness zone
7a
More local growing data for St. Charles: nearby ZIP 42453 weather · frost dates · planting calendar · Kentucky frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Madisonville, Ky (13.6 mi from St. Charles). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.