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.

Partly Cloudy

78°F

26°C

Humidity 67%
Wind Speed SW 7 mph
Barometer 29.91 in (1012.6 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 15 Oct 6:53 pm CDT
Extended Forecast for

East St. Louis IL

  • Tonight

    Tonight: Scattered showers and thunderstorms before 2am, then isolated showers between 2am and 3am. Increasing clouds, with a low around 50. Southwest wind 10 to 16 mph becoming northwest after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 50%.

    Low: 50 °F

    Scattered
    Showers

  • Friday

    Friday: Isolated showers after 4pm. Mostly cloudy, with a high near 56. Northwest wind 16 to 18 mph, with gusts as high as 33 mph. Chance of precipitation is 20%.

    High: 56 °F

    Partly Sunny
    then Isolated
    Showers

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 40. Northwest wind 8 to 16 mph, with gusts as high as 28 mph.

    Low: 40 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny, with a high near 61. North wind around 6 mph becoming calm in the afternoon.

    High: 61 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 38. Calm wind.

    Low: 38 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

Detailed Forecast

Tonight
Scattered showers and thunderstorms before 2am, then isolated showers between 2am and 3am. Increasing clouds, with a low around 50. Southwest wind 10 to 16 mph becoming northwest after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 50%.
Friday
Isolated showers after 4pm. Mostly cloudy, with a high near 56. Northwest wind 16 to 18 mph, with gusts as high as 33 mph. Chance of precipitation is 20%.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 40. Northwest wind 8 to 16 mph, with gusts as high as 28 mph.
Saturday
Sunny, with a high near 61. North wind around 6 mph becoming calm in the afternoon.
Saturday Night
Clear, with a low around 38. Calm wind.
Sunday
Sunny, with a high near 68.
Sunday Night
Mostly clear, with a low around 41.
Monday
Mostly sunny, with a high near 72.
Monday Night
Partly cloudy, with a low around 45.
Tuesday
Mostly sunny, with a high near 77.
Tuesday Night
Mostly clear, with a low around 49.
Wednesday
Sunny, with a high near 79.
Wednesday Night
Mostly clear, with a low around 51.
Thursday
Sunny, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
East St. Louis IL
 38.62°N 90.12°W (Elev. 413 ft)
Last Update:
5:41 pm CDT Oct 15, 2026
Forecast Valid:
7pm CDT Oct 15, 2026-6pm CDT Oct 22, 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