St. Charles, KY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Charles, a city in Hopkins County, Kentucky.
Tonight
71°F
Slight Chance Showers And Thunderstorms then Partly Cloudy
A slight chance of showers and thunderstorms before 10pm. Partly cloudy. Low around 71, with temperatures rising to around 73 overnight. East southeast wind around 2 mph. Chance of precipitation is 20%.
7-day forecast for St. Charles
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 71°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 2 mph ESE | 15% |
| Saturday | 97°F | Sunny | 1 to 5 mph SW | 9% |
| Saturday Night | 73°F | Mostly Clear | 3 mph SSW | 6% |
| Sunday | 97°F | Sunny | 3 to 7 mph WSW | 0% |
| Sunday Night | 71°F | Partly Cloudy | 3 mph NE | 2% |
| Monday | 92°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 6 mph N | 29% |
| Monday Night | 65°F | Chance Showers And Thunderstorms | 6 mph NNE | 41% |
| Tuesday | 82°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 7 mph N | 31% |
| Tuesday Night | 60°F | Slight Chance Showers And Thunderstorms | 3 to 8 mph N | 19% |
| Wednesday | 78°F | Slight Chance Rain Showers then Mostly Sunny | 6 mph N | 19% |
| Wednesday Night | 58°F | Partly Cloudy | 5 mph N | 9% |
| Thursday | 78°F | Mostly Sunny | 2 to 6 mph N | 6% |
| Thursday Night | 59°F | Partly Cloudy | 5 mph NNE | 6% |
| Friday | 77°F | Mostly Sunny | 3 to 7 mph NNE | 6% |
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 Sep 19, 2026.