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

59°F

15°C

Humidity 67%
Wind Speed Vrbl 6 mph
Barometer 30.02 in (1016.5 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 4 Nov 10:53 pm CST
Extended Forecast for

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

  • Tonight

    Tonight: Partly cloudy, with a low around 51. Southwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 51 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 70. Southwest wind 9 to 14 mph becoming north in the afternoon. Winds could gust as high as 22 mph.

    High: 70 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 36. North wind 5 to 7 mph becoming calm in the evening.

    Low: 36 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 64. Light east wind becoming southeast 9 to 14 mph in the morning. Winds could gust as high as 22 mph.

    High: 64 °F

    Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers after midnight. Mostly cloudy, with a low around 50. Southeast wind around 10 mph becoming southwest after midnight.

    Low: 50 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers before noon. Mostly sunny, with a high near 71.

    High: 71 °F

    Chance
    Showers then
    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of rain before midnight. Partly cloudy, with a low around 37.

    Low: 37 °F

    Chance Rain
    then Partly
    Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 51. Southwest wind around 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 70. Southwest wind 9 to 14 mph becoming north in the afternoon. Winds could gust as high as 22 mph.
Wednesday Night
Clear, with a low around 36. North wind 5 to 7 mph becoming calm in the evening.
Thursday
Sunny, with a high near 64. Light east wind becoming southeast 9 to 14 mph in the morning. Winds could gust as high as 22 mph.
Thursday Night
A 30 percent chance of showers after midnight. Mostly cloudy, with a low around 50. Southeast wind around 10 mph becoming southwest after midnight.
Friday
A 30 percent chance of showers before noon. Mostly sunny, with a high near 71.
Friday Night
Mostly clear, with a low around 42.
Saturday
Mostly sunny, with a high near 68.
Saturday Night
A 30 percent chance of rain before midnight. Partly cloudy, with a low around 37.
Sunday
Partly sunny, with a high near 46.
Sunday Night
Partly cloudy, with a low around 25.
Monday
Sunny, with a high near 44.
Monday Night
Mostly clear, with a low around 26.
Veterans Day
Mostly sunny, with a high near 54.
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Forecast Area
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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:
10:36 pm CST Nov 4, 2025
Forecast Valid:
11pm CST Nov 4, 2025-6pm CST Nov 11, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation