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National Weather Service Forecast for: St. Charles County
Issued by: NWS National Weather Service Saint Louis, MO
Updated: 454 PM CST Tue Feb 18 2025
St. Charles , MO
 
Tonight


Snow
Snow
Wednesday


Mostly Cloudy
Mostly Cloudy
Wednesday
Night

Mostly Cloudy
Mostly Cloudy
Thursday


Sunny
Sunny
Thursday
Night

Mostly Clear
Mostly Clear
Friday


Sunny
Sunny
Friday
Night

Partly Cloudy
Partly Cloudy
Saturday


Partly Cloudy
Partly Cloudy
Saturday
Night

Partly Cloudy
Partly Cloudy
Lo ≈8°F Hi ≈18°F Lo ≈2°F Hi ≈18°F Lo ≈4°F Hi ≈25°F Lo ≈18°F Hi ≈35°F Lo ≈25°F

 

Tonight
 
Snow. Snow accumulation around an inch. Lows around 8 above. North winds 10 to 15 mph. Chance of snow near 100 percent. Wind chill values as low as 8 below after midnight.
Wednesday
 
Partly sunny in the morning, then becoming mostly cloudy. A chance of flurries. Highs around 18. North winds 10 to 15 mph. Wind chill values as low as 8 below in the morning.
Wednesday Night
 
Mostly cloudy with a chance of flurries in the evening, then partly cloudy after midnight. Cold with lows around 2 above. Northwest winds around 10 mph with gusts up to 25 mph. Wind chill values as low as 15 below.
Thursday
 
Sunny. Highs around 18. Northwest winds 5 to 10 mph. Wind chill values as low as 15 below in the morning.
Thursday Night
 
Mostly clear. Cold with lows around 4 above. Northwest winds around 5 mph.
Friday
 
Sunny. Not as cool with highs in the upper 20s.
Friday Night
 
Partly cloudy. Lows 15 to 20.
Saturday
 
Partly cloudy. Highs in the upper 30s.
Saturday Night
 
Partly cloudy. Lows in the mid 20s.
Sunday
 
Partly cloudy. Highs in the upper 40s.
Sunday Night
 
Partly cloudy. Lows in the lower 30s.
Monday
 
Partly cloudy. Highs in the upper 50s.
Monday Night
 
Partly cloudy. Lows in the upper 30s. Highs in the lower 50s..
Tuesday
 
Partly cloudy. Lows in the upper 30s. Highs in the lower 50s..
Zone Forecast
 
St. Charles County

 

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