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

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Cahokia IL

  • Overnight

    Overnight: Showers likely and possibly a thunderstorm before 5am, then a chance of showers and thunderstorms after 5am. Cloudy, with a low around 49. Light northeast wind. Chance of precipitation is 60%.

    Low: 49 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Showers and thunderstorms. Patchy fog before 11am. High near 62. Calm wind becoming east around 6 mph in the morning. Chance of precipitation is 90%.

    High: 62 °F

    Chance
    T-storms and
    Patchy Fog
    then Showers

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 11pm. Patchy fog between 3am and 4am. Low around 55. Light and variable wind becoming south around 6 mph in the evening. Chance of precipitation is 90%.

    Low: 55 °F

    T-storms then
    Showers and
    Patchy Fog

  • Thursday

    Thursday: Showers likely, mainly before 9am. Mostly cloudy, with a high near 69. West wind 3 to 8 mph. Chance of precipitation is 60%.

    High: 69 °F

    Showers
    Likely then
    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers before 9pm, then a chance of showers and thunderstorms between 9pm and 3am, then a chance of showers after 3am. Mostly cloudy, with a low around 59. South wind 3 to 7 mph. Chance of precipitation is 50%.

    Low: 59 °F

    Chance
    Showers

  • Friday

    Friday: A 40 percent chance of showers, mainly before noon. Partly sunny, with a high near 79.

    High: 79 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 56. Chance of precipitation is 90%.

    Low: 56 °F

    Chance
    T-storms then
    Showers

  • Saturday

    Saturday: A 40 percent chance of showers before noon. Partly sunny, with a high near 67.

    High: 67 °F

    Chance
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy

Detailed Forecast

Overnight
Showers likely and possibly a thunderstorm before 5am, then a chance of showers and thunderstorms after 5am. Cloudy, with a low around 49. Light northeast wind. Chance of precipitation is 60%.
Wednesday
Showers and thunderstorms. Patchy fog before 11am. High near 62. Calm wind becoming east around 6 mph in the morning. Chance of precipitation is 90%.
Wednesday Night
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 11pm. Patchy fog between 3am and 4am. Low around 55. Light and variable wind becoming south around 6 mph in the evening. Chance of precipitation is 90%.
Thursday
Showers likely, mainly before 9am. Mostly cloudy, with a high near 69. West wind 3 to 8 mph. Chance of precipitation is 60%.
Thursday Night
A chance of showers before 9pm, then a chance of showers and thunderstorms between 9pm and 3am, then a chance of showers after 3am. Mostly cloudy, with a low around 59. South wind 3 to 7 mph. Chance of precipitation is 50%.
Friday
A 40 percent chance of showers, mainly before noon. Partly sunny, with a high near 79.
Friday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 56. Chance of precipitation is 90%.
Saturday
A 40 percent chance of showers before noon. Partly sunny, with a high near 67.
Saturday Night
Partly cloudy, with a low around 41.
Sunday
Sunny, with a high near 68.
Sunday Night
Mostly clear, with a low around 49.
Monday
Sunny, with a high near 79.
Monday Night
A 30 percent chance of showers and thunderstorms. Mostly clear, with a low around 61.
Tuesday
Showers and thunderstorms likely. Mostly cloudy, with a high near 78. Chance of precipitation is 70%.
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ABOUT THIS FORECAST

 
Point Forecast:
Cahokia IL
 38.57°N 90.18°W (Elev. 407 ft)
Last Update:
12:51 am CST Mar 4, 2026
Forecast Valid:
4am CST Mar 4, 2026-6pm CDT Mar 10, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation