Current conditions at

St. Louis Downtown Airport (KCPS)

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

Fair

56°F

13°C

Humidity 51%
Wind Speed S 7 mph
Barometer 29.87 in (1011.3 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 26 Feb 12:53 pm CST
Detailed forecast for

St. Clair County

This Afternoon
Sunny. Near steady temperature in the upper 50s. West winds around 5 mph.
Tonight
Clear. Lows in the upper 30s. Southwest winds around 5 mph.
Friday
Sunny. Not as cool with highs around 70. Southwest winds 10 to 15 mph.
Friday Night
Mostly clear. Lows around 40. Southwest winds 5 to 10 mph, becoming north after midnight.
Saturday
Mostly sunny with a 20 percent chance of rain. Highs in the lower 60s. East winds 5 to 10 mph.
Saturday Night
Partly cloudy. Cooler with lows in the upper 20s.
Sunday
Mostly cloudy. A slight chance of freezing rain in the morning, then a chance of rain and snow in the afternoon. Much cooler with highs in the lower 40s. Chance of precipitation 50 percent.
Sunday Night
Rain and snow. Light snow accumulation. Lows in the upper 20s. Chance of precipitation 80 percent.
Monday
Mostly cloudy. A slight chance of rain, snow and freezing rain in the morning. Highs in the lower 40s. Chance of precipitation 20 percent.
Monday Night
Mostly cloudy. A slight chance of rain in the evening, then a chance of rain after midnight. Lows around 30. Chance of rain 40 percent.
Tuesday And Tuesday Night
Rain likely. Highs in the mid 40s. Lows in the upper 30s. Chance of rain 60 percent.
Wednesday
Rain likely. Not as cool with highs in the mid 50s. Chance of rain 70 percent.



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113 PM CST Thu Feb 26 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database