National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

37°F

3°C

Humidity 44%
Wind Speed SE 6 mph
Barometer 30.38 in (1029.0 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 7 Feb 1:53 pm CST
Extended Forecast for

Cahokia / St. Louis, St. Louis Downtown Airport IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 38. Southeast wind around 6 mph.

    High: 38 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 25. Southeast wind 6 to 10 mph.

    Low: 25 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 47. Southeast wind 8 to 10 mph.

    High: 47 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 27. Southeast wind 5 to 7 mph becoming calm after midnight.

    Low: 27 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 56. Calm wind becoming south around 6 mph in the afternoon.

    High: 56 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 20 percent chance of rain after noon. Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Tuesday Night

    Tuesday Night: Rain likely, mainly before midnight. Mostly cloudy, with a low around 35. Chance of precipitation is 60%.

    Low: 35 °F

    Rain Likely

  • Wednesday

    Wednesday: A 30 percent chance of rain before noon. Mostly cloudy, with a high near 49.

    High: 49 °F

    Chance Rain
    then Mostly
    Cloudy

Detailed Forecast

This Afternoon
Sunny, with a high near 38. Southeast wind around 6 mph.
Tonight
Mostly cloudy, with a low around 25. Southeast wind 6 to 10 mph.
Sunday
Mostly sunny, with a high near 47. Southeast wind 8 to 10 mph.
Sunday Night
Mostly clear, with a low around 27. Southeast wind 5 to 7 mph becoming calm after midnight.
Monday
Sunny, with a high near 56. Calm wind becoming south around 6 mph in the afternoon.
Monday Night
Mostly clear, with a low around 38.
Tuesday
A 20 percent chance of rain after noon. Mostly sunny, with a high near 62.
Tuesday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 35. Chance of precipitation is 60%.
Wednesday
A 30 percent chance of rain before noon. Mostly cloudy, with a high near 49.
Wednesday Night
A 30 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 34.
Thursday
A 30 percent chance of rain. Cloudy, with a high near 44.
Thursday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 28.
Friday
A 20 percent chance of rain. Partly sunny, with a high near 46.
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ABOUT THIS FORECAST

 
Point Forecast:
Cahokia / St. Louis, St. Louis Downtown Airport IL
 38.57°N 90.15°W (Elev. 407 ft)
Last Update:
2:36 pm CST Feb 7, 2026
Forecast Valid:
2pm CST Feb 7, 2026-6pm CST Feb 13, 2026
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation