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.

Fog

48°F

9°C

Humidity 96%
Wind Speed NE 6 mph
Barometer 30.05 in (1017.6 mb)
Dewpoint 47°F (8°C)
Visibility 0.25 mi
Wind Chill45°F (7°C)
Last update 4 Mar 10:54 am CST
Extended Forecast for

Brussels IL

  • Today

    Today: Showers and possibly a thunderstorm before 2pm, then showers and thunderstorms likely, mainly between 2pm and 4pm. Patchy fog before 1pm. High near 59. Light and variable wind. Chance of precipitation is 90%.

    High: 59 °F

    T-storms and
    Patchy Fog

  • Tonight

    Tonight: Showers and thunderstorms before 4am, then showers likely and possibly a thunderstorm between 4am and 5am, then scattered showers and thunderstorms after 5am. Patchy fog after 8pm. Low around 51. Calm wind becoming northwest around 5 mph after midnight. Chance of precipitation is 80%.

    Low: 51 °F

    T-storms and
    Patchy Fog

  • Thursday

    Thursday: Scattered showers, mainly before 7am. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 67. West wind 5 to 7 mph becoming light and variable in the afternoon. Chance of precipitation is 40%.

    High: 67 °F

    Scattered
    Showers and
    Patchy Fog
    then Partly
    Sunny

  • Thursday Night

    Thursday Night: Scattered showers before midnight, then showers likely and possibly a thunderstorm between midnight and 3am, then showers likely after 3am. Mostly cloudy, with a low around 55. Calm wind becoming south 5 to 9 mph in the evening. Chance of precipitation is 60%.

    Low: 55 °F

    Scattered
    Showers then
    Showers
    Likely

  • Friday

    Friday: A 50 percent chance of showers. Partly sunny, with a high near 79. South wind 10 to 18 mph, with gusts as high as 29 mph.

    High: 79 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 52. Chance of precipitation is 90%.

    Low: 52 °F

    Showers
    Likely then
    Showers

  • Saturday

    Saturday: A 30 percent chance of showers before noon. Partly sunny, with a high near 63.

    High: 63 °F

    Chance
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

Detailed Forecast

Today
Showers and possibly a thunderstorm before 2pm, then showers and thunderstorms likely, mainly between 2pm and 4pm. Patchy fog before 1pm. High near 59. Light and variable wind. Chance of precipitation is 90%.
Tonight
Showers and thunderstorms before 4am, then showers likely and possibly a thunderstorm between 4am and 5am, then scattered showers and thunderstorms after 5am. Patchy fog after 8pm. Low around 51. Calm wind becoming northwest around 5 mph after midnight. Chance of precipitation is 80%.
Thursday
Scattered showers, mainly before 7am. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 67. West wind 5 to 7 mph becoming light and variable in the afternoon. Chance of precipitation is 40%.
Thursday Night
Scattered showers before midnight, then showers likely and possibly a thunderstorm between midnight and 3am, then showers likely after 3am. Mostly cloudy, with a low around 55. Calm wind becoming south 5 to 9 mph in the evening. Chance of precipitation is 60%.
Friday
A 50 percent chance of showers. Partly sunny, with a high near 79. South wind 10 to 18 mph, with gusts as high as 29 mph.
Friday Night
Showers and possibly a thunderstorm. Low around 52. Chance of precipitation is 90%.
Saturday
A 30 percent chance of showers before noon. Partly sunny, with a high near 63.
Saturday Night
Partly cloudy, with a low around 39.
Sunday
Sunny, with a high near 67.
Sunday Night
Mostly clear, with a low around 47.
Monday
Sunny, with a high near 78.
Monday Night
A 40 percent chance of showers and thunderstorms. Mostly clear, with a low around 59.
Tuesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 77. Chance of precipitation is 70%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Brussels IL
 38.94°N 90.59°W (Elev. 505 ft)
Last Update:
10:26 am CST Mar 4, 2026
Forecast Valid:
11am CST Mar 4, 2026-6pm CDT Mar 10, 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