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.

Fair

72°F

22°C

Humidity 94%
Wind Speed E 3 mph
Barometer 30.07 in (1018.0 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 4 Aug 9:53 pm CDT
Extended Forecast for

East St. Louis IL

  • Tonight

    Tonight: Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 66. East wind 3 to 5 mph.

    Low: 66 °F

    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog before 8am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 86. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 86 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 69. East wind around 6 mph becoming calm in the evening.

    Low: 69 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 90. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 90 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 71. East wind around 5 mph becoming calm in the evening.

    Low: 71 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 72.

    Low: 72 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 74.

    Low: 74 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 66. East wind 3 to 5 mph.
Tuesday
Patchy fog before 8am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 86. Calm wind becoming northeast around 5 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 69. East wind around 6 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 90. Calm wind becoming southeast around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 71. East wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 92.
Thursday Night
Mostly clear, with a low around 72.
Friday
Sunny, with a high near 93.
Friday Night
Mostly clear, with a low around 74.
Saturday
Sunny, with a high near 94.
Saturday Night
Mostly clear, with a low around 74.
Sunday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
Sunday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Monday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
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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:
10:06 pm CDT Aug 4, 2025
Forecast Valid:
11pm CDT Aug 4, 2025-6pm CDT Aug 11, 2025
 
Forecast Discussion
 
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Additional Resources

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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