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

83°F

28°C

Humidity 61%
Wind Speed E 6 mph
Barometer 30.14 in (1020.3 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 5 Aug 6:53 pm CDT
Extended Forecast for

Belleville IL

  • Tonight

    Tonight: Patchy fog after 5am. Otherwise, mostly clear, with a low around 68. Calm wind.

    Low: 68 °F

    Clear then
    Patchy Fog

  • Wednesday

    Wednesday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 89. Light southeast wind.

    High: 89 °F

    Patchy Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 71. Light southeast wind.

    Low: 71 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 92. Calm wind becoming southeast around 6 mph in the afternoon.

    High: 92 °F

    Sunny

  • Thursday Night

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

    Low: 71 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy fog after 5am. Otherwise, mostly clear, with a low around 68. Calm wind.
Wednesday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 89. Light southeast wind.
Wednesday Night
Mostly clear, with a low around 71. Light southeast wind.
Thursday
Sunny, with a high near 92. Calm wind becoming southeast around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 71. Southeast wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 92.
Friday Night
Mostly clear, with a low around 73.
Saturday
Sunny, with a high near 92.
Saturday Night
Mostly clear, with a low around 73.
Sunday
Sunny, with a high near 93.
Sunday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 74.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Belleville IL
 38.52°N 89.98°W (Elev. 509 ft)
Last Update:
5:41 pm CDT Aug 5, 2025
Forecast Valid:
7pm CDT Aug 5, 2025-6pm CDT Aug 12, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation