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.

A Few Clouds

71°F

22°C

Humidity 96%
Wind Speed NE 3 mph
Barometer 29.88 in (1011.3 mb)
Dewpoint 70°F (21°C)
Visibility 8.00 mi
Last update 14 Jun 1:53 am CDT
Extended Forecast for

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

  • Overnight

    Overnight: Isolated showers. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 68. Calm wind. Chance of precipitation is 20%.

    Low: 68 °F

    Isolated
    Showers and
    Patchy Fog

  • Saturday

    Saturday: Scattered showers and thunderstorms, mainly between 1pm and 4pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 83. Light north wind increasing to 5 to 9 mph in the morning. Chance of precipitation is 30%.

    High: 83 °F

    Scattered
    T-storms and
    Patchy Fog

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 67. North wind around 6 mph becoming calm in the evening.

    Low: 67 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 87. Light northeast wind.

    High: 87 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 68. Light and variable wind.

    Low: 68 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 85. Chance of precipitation is 40%.

    High: 85 °F

    Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69.

    Low: 69 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73.

    Low: 73 °F

    Slight Chance
    T-storms

Detailed Forecast

Overnight
Isolated showers. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 68. Calm wind. Chance of precipitation is 20%.
Saturday
Scattered showers and thunderstorms, mainly between 1pm and 4pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 83. Light north wind increasing to 5 to 9 mph in the morning. Chance of precipitation is 30%.
Saturday Night
Partly cloudy, with a low around 67. North wind around 6 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 87. Light northeast wind.
Sunday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 68. Light and variable wind.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 85. Chance of precipitation is 40%.
Monday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 89.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73.
Wednesday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70.
Juneteenth
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Thursday Night
Mostly clear, with a low around 67.
Friday
Sunny, with a high near 88.
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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:
1:52 am CDT Jun 14, 2025
Forecast Valid:
2am CDT Jun 14, 2025-6pm CDT Jun 20, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation