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.

Overcast

16°F

-9°C

Humidity 59%
Wind Speed N 15 mph
Barometer 30.56 in (1035.3 mb)
Dewpoint 4°F (-16°C)
Visibility 10.00 mi
Wind Chill1°F (-17°C)
Last update 23 Feb 5:53 am CST
Extended Forecast for

East St. Louis IL

  • Today

    Today: Cloudy through mid morning, then gradual clearing, with a high near 31. Northwest wind 5 to 15 mph, with gusts as high as 23 mph.

    High: 31 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 21. Calm wind becoming south 5 to 7 mph after midnight.

    Low: 21 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 52. South wind 10 to 18 mph, with gusts as high as 30 mph.

    High: 52 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 35. Southwest wind 8 to 13 mph becoming light and variable after midnight. Winds could gust as high as 21 mph.

    Low: 35 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 54. Light and variable wind becoming west around 6 mph in the morning.

    High: 54 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of rain, then rain likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 38. Chance of precipitation is 60%.

    Low: 38 °F

    Slight Chance
    Rain then
    Rain Likely

  • Thursday

    Thursday: A 40 percent chance of rain before noon. Partly sunny, with a high near 49.

    High: 49 °F

    Chance Rain
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 31.

    Low: 31 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

Detailed Forecast

Today
Cloudy through mid morning, then gradual clearing, with a high near 31. Northwest wind 5 to 15 mph, with gusts as high as 23 mph.
Tonight
Mostly clear, with a low around 21. Calm wind becoming south 5 to 7 mph after midnight.
Tuesday
Partly sunny, with a high near 52. South wind 10 to 18 mph, with gusts as high as 30 mph.
Tuesday Night
Mostly cloudy, with a low around 35. Southwest wind 8 to 13 mph becoming light and variable after midnight. Winds could gust as high as 21 mph.
Wednesday
Mostly sunny, with a high near 54. Light and variable wind becoming west around 6 mph in the morning.
Wednesday Night
A slight chance of rain, then rain likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 38. Chance of precipitation is 60%.
Thursday
A 40 percent chance of rain before noon. Partly sunny, with a high near 49.
Thursday Night
Mostly clear, with a low around 31.
Friday
Sunny, with a high near 63.
Friday Night
Mostly clear, with a low around 40.
Saturday
Mostly sunny, with a high near 65.
Saturday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 35.
Sunday
A 30 percent chance of rain. Partly sunny, with a high near 51.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
East St. Louis IL
 38.62°N 90.12°W (Elev. 413 ft)
Last Update:
5:31 am CST Feb 23, 2026
Forecast Valid:
6am CST Feb 23, 2026-6pm CST Mar 1, 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