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National Weather Service Forecast for: St. Charles County
Issued by: NWS National Weather Service Saint Louis, MO

Updated: 554 AM CDT Tue Mar 21 2023

St. Charles , MO

Today Chance rain	Tonight Chance rain	Wednesday Thunder storm	Wednesday Night Thunder storm	Thursday Thunder storm	Thursday Night Thunder storm	Friday Thunder storm	Friday Night Chance rain	Saturday Partly Sunny
Hi ≈45°F	Lo ≈45°F	Hi ≈65°F	Lo ≈65°F	Hi ≈75°F	Lo ≈45°F	Hi ≈55°F	Lo ≈40°F	Hi ≈55°F

Today	A chance of rain this morning, then rain this afternoon. Cooler with highs in the upper 40s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain near 100 percent.
Tonight	Rain, mainly in the evening. Lows in the lower 40s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain near 100 percent.
Wednesday	Cloudy with a slight chance of thunderstorms. Showers likely in the morning, then a slight chance of rain in the afternoon. Not as cool with highs in the mid 60s. South winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 60 percent.
Wednesday Night	Cloudy. A chance of rain with a slight chance of thunderstorms after midnight. Breezy and not as cool. Near steady temperature in the lower 60s. South winds 15 to 25 mph with gusts up to 35 mph. Chance of rain 50 percent.
Thursday	Cloudy. A chance of rain with a slight chance of thunderstorms in the morning, then showers with a chance of thunderstorms in the afternoon. Breezy with highs in the lower 70s. Southwest winds 15 to 25 mph with gusts up to 35 mph. Chance of rain 80 percent.
Thursday Night	A chance of thunderstorms. Showers. Locally heavy rainfall possible in the evening. Cooler with lows in the mid 40s. Chance of rain near 100 percent.
Friday	A chance of rain in the morning, then rain likely with a slight chance of thunderstorms in the afternoon. Much cooler with highs in the lower 50s. Chance of rain 70 percent.
Friday Night	Mostly cloudy. A chance of rain, mainly in the evening. Lows around 40. Chance of rain 50 percent.
Saturday	Partly sunny. Highs in the upper 50s.
Saturday Night	Mostly clear in the evening, then partly cloudy with a slight chance of rain after midnight. Lows in the upper 30s. Chance of rain 20 percent.
Sunday	Mostly sunny. A slight chance of rain in the morning, then a chance of rain in the afternoon. Highs in the lower 60s. Chance of rain 40 percent.
Sunday Night	Mostly cloudy with a 50 percent chance of rain. Lows in the upper 40s.
Monday	Partly sunny with a 20 percent chance of rain. Highs in the upper 50s.

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