National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

66°F

19°C

Humidity 81%
Wind Speed Calm
Barometer 30.04 in (1016.8 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 4 Aug 4:54 am CDT
Extended Forecast for

Brussels IL

  • Today

    Today: Isolated showers and thunderstorms after 4pm. Partly sunny, with a high near 82. Calm wind becoming north 5 to 7 mph in the afternoon. Chance of precipitation is 20%.

    High: 82 °F

    Mostly Cloudy
    then Isolated
    T-storms

  • Tonight

    Tonight: Isolated showers and thunderstorms before 8pm. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 65. Northeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 65 °F

    Isolated
    T-storms then
    Patchy Fog

  • Tuesday

    Tuesday: Isolated showers and thunderstorms after 1pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 84. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 20%.

    High: 84 °F

    Patchy Fog
    then Isolated
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 66. Light east wind.

    Low: 66 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88. Light south wind.

    High: 88 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 90.

    High: 90 °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 92.

    High: 92 °F

    Sunny

Detailed Forecast

Today
Isolated showers and thunderstorms after 4pm. Partly sunny, with a high near 82. Calm wind becoming north 5 to 7 mph in the afternoon. Chance of precipitation is 20%.
Tonight
Isolated showers and thunderstorms before 8pm. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 65. Northeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 20%.
Tuesday
Isolated showers and thunderstorms after 1pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 84. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 20%.
Tuesday Night
Mostly clear, with a low around 66. Light east wind.
Wednesday
Sunny, with a high near 88. Light south wind.
Wednesday Night
Mostly clear, with a low around 70.
Thursday
Sunny, with a high near 90.
Thursday Night
Mostly clear, with a low around 72.
Friday
Sunny, with a high near 92.
Friday Night
Mostly clear, with a low around 74.
Saturday
Sunny, with a high near 93.
Saturday Night
Partly cloudy, with a low around 74.
Sunday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Brussels IL
 38.96°N 90.59°W (Elev. 499 ft)
Last Update:
4:41 am CDT Aug 4, 2025
Forecast Valid:
5am CDT Aug 4, 2025-6pm CDT Aug 10, 2025
 
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