Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56° N Lon: 90.15° W Elev: 410 ft.

Mostly Cloudy

79°F

26°C

Humidity 41%
Wind Speed S 10 G 21 mph
Barometer 29.58 in (1001.5 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 4 May 6:53 pm CDT
Detailed forecast for

St. Clair County

Tonight
Mostly cloudy with scattered thunderstorms. Scattered showers this evening, then numerous showers after midnight. Lows in the mid 50s. Southwest winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 70 percent.
Tuesday
Showers. Scattered thunderstorms, mainly in the morning. Much cooler with highs in the upper 50s. North winds 5 to 10 mph with gusts up to 25 mph. Chance of rain 90 percent.
Tuesday Night
Mostly cloudy. Showers with isolated thunderstorms in the evening, then scattered showers after midnight. Cooler with lows in the mid 40s. North winds 10 to 15 mph. Chance of rain 90 percent.
Wednesday
Partly sunny. A chance of showers, mainly in the morning. Highs in the upper 50s. North winds 5 to 10 mph. Chance of rain 40 percent.
Wednesday Night
Mostly cloudy in the evening, then becoming partly cloudy. Lows in the lower 40s. North winds 5 to 10 mph.
Thursday And Thursday Night
Mostly clear. Highs in the mid 60s. Lows in the mid 40s.
Friday
Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the mid 70s. Chance of rain 20 percent.
Friday Night
Partly cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then a slight chance of showers after midnight. Lows around 50. Chance of rain 30 percent.
Saturday
Sunny. Highs in the upper 70s.
Saturday Night
Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the mid 50s. Chance of rain 20 percent.
Sunday
Partly sunny with a chance of showers and thunderstorms. Highs in the mid 70s. Chance of rain 50 percent.
Sunday Night
Mostly cloudy with a 50 percent chance of showers. Lows in the lower 50s.
Monday
Mostly sunny. A slight chance of showers in the morning. Highs in the lower 70s. Chance of rain 20 percent.



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528 PM CDT Mon May 4 2026
 
 

Additional Resources

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National Digital Forecast Database