Alton Pool Forecast

Home

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

Updated: 408 PM CDT Sun Oct 26 2025

St. Charles , MO

Tonight Chance rain	Monday Chance rain	Monday Night Mostly Cloudy	Tuesday Rain likely	Tuesday Night Chance rain	Wednesday Chance rain	Wednesday Night Chance rain	Thursday Chance rain	Thursday Night Chance rain
Lo ≈55°F	Hi ≈60°F	Lo ≈50°F	Hi ≈60°F	Lo ≈45°F	Hi ≈55°F	Lo ≈45°F	Hi ≈55°F	Lo ≈35°F

Tonight	Cloudy. Showers, mainly this evening. Near steady temperature in the lower 50s. East winds 5 to 10 mph with gusts up to 25 mph. Chance of rain 90 percent.
Monday	Cloudy. A chance of showers in the morning. Highs around 60. East winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 30 percent.
Monday Night	Mostly cloudy. Lows around 50. East winds 5 to 10 mph.
Tuesday	Cloudy. A slight chance of rain in the morning, then rain likely in the afternoon. Highs around 60. Southeast winds 5 to 10 mph. Chance of rain 70 percent.
Tuesday Night	Rain. Lows in the upper 40s. East winds 5 to 10 mph. Chance of rain 80 percent.
Wednesday	Rain. Highs in the mid 50s. Chance of rain 80 percent.
Wednesday Night	Mostly cloudy with a 50 percent chance of rain. Lows in the lower 40s.
Thursday	Mostly sunny. A chance of rain, mainly in the morning. Highs in the mid 50s. Chance of rain 30 percent.
Thursday Night	Partly cloudy. A slight chance of rain in the evening. Lows in the upper 30s. Chance of rain 20 percent.
Friday	Partly cloudy. Highs around 60.
Friday Night	Partly cloudy. Lows in the upper 30s.
Saturday	Partly cloudy. Highs around 60.
Saturday Night	Partly cloudy. A slight chance of rain in the evening. Lows in the lower 40s. Chance of rain 20 percent.
Sunday	Mostly sunny. Highs in the lower 60s.
Zone Forecast	St. Charles County

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