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Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

68°F

20°C

Humidity 40%
Wind Speed S 9 mph
Barometer 30.11 in (1019.5 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 14 May 11:53 am CDT
Extended Forecast for

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

  • This Afternoon

    This Afternoon: Sunny, with a high near 75. South wind 6 to 8 mph.

    High: 75 °F

    Sunny

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 54. Southeast wind 8 to 10 mph.

    Low: 54 °F

    Partly Cloudy
    then Chance
    T-storms

  • Friday

    Friday: A chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 4pm. Cloudy, then gradually becoming mostly sunny, with a high near 83. Southeast wind 11 to 15 mph becoming south in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 40%.

    High: 83 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 65. South wind around 10 mph.

    Low: 65 °F

    Mostly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7am. Partly sunny, with a high near 85. South wind 8 to 11 mph. Chance of precipitation is 70%.

    High: 85 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 63.

    Low: 63 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90.

    High: 90 °F

    Sunny then
    Chance
    T-storms

Detailed Forecast

This Afternoon
Sunny, with a high near 75. South wind 6 to 8 mph.
Tonight
A 30 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 54. Southeast wind 8 to 10 mph.
Friday
A chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 4pm. Cloudy, then gradually becoming mostly sunny, with a high near 83. Southeast wind 11 to 15 mph becoming south in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 40%.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 65. South wind around 10 mph.
Saturday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7am. Partly sunny, with a high near 85. South wind 8 to 11 mph. Chance of precipitation is 70%.
Saturday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 63.
Sunday
Mostly sunny, with a high near 91.
Sunday Night
Mostly clear, with a low around 70.
Monday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90.
Monday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Tuesday
Showers and thunderstorms likely. Partly sunny, with a high near 84. Chance of precipitation is 70%.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 64. Chance of precipitation is 70%.
Wednesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 79.
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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:
10:46 am CDT May 14, 2026
Forecast Valid:
12pm CDT May 14, 2026-6pm CDT May 20, 2026
 
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Additional Resources

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Chance of Precipitation