Home

National Weather Service Forecast for: St. Charles County
Issued by: NWS National Weather Service Saint Louis, MO
Updated: 1004 PM CDT Sat Jul 11 2026
St. Charles , MO
 
Tonight


Thunder storm
Thunder storm		 Sunday


Sunny
Sunny		 Sunday
Night

Clear
Clear		 Monday


Sunny
Sunny		 Monday
Night

Clear
Clear		 Tuesday


Mostly Clear
Mostly Clear		 Tuesday
Night

Mostly Clear
Mostly Clear
Lo ≈65°F Hi ≈85°F Lo ≈65°F Hi ≈85°F Lo ≈65°F Hi ≈95°F Lo ≈75°F

 

Tonight
 
 Mostly clear. A chance of showers and thunderstorms this evening. Lows in the upper 60s. North winds 5 to 10 mph. Chance of rain 40 percent.
Sunday
 
 Sunny. Highs in the mid 80s. Northeast winds 10 to 15 mph.
Sunday Night
 
 Clear. Lows in the upper 60s. North winds 5 to 10 mph.
Monday
 
 Sunny. Highs in the upper 80s. Northeast winds 5 to 10 mph.
Monday Night
 
 Clear. Lows in the upper 60s. Northeast winds 5 to 10 mph.
Tuesday
 
 Mostly clear. Highs in the lower 90s.
Tuesday Night
 
 Mostly clear. Lows in the lower 70s.
Wednesday
 
 Mostly clear. Highs in the lower 90s.
Wednesday Night
 
 Mostly clear. Lows in the lower 70s.
Thursday
 
 Mostly clear. Highs in the lower 90s.
Thursday Night
 
 Mostly clear. Lows in the lower 70s.
Friday
 
 Mostly clear. Highs in the lower 90s.
Friday Night
 
 Mostly clear. Lows in the lower 70s.
Saturday
 
 Mostly clear. Highs in the lower 90s.
Zone Forecast
 
 St. Charles County

 

Forecast from NOAA-NWS for St. Charles County. (Zone forecast)