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

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

84°F

29°C

Humidity 23%
Wind Speed Vrbl 5 mph
Barometer 30.05 in (1017.1 mb)
Dewpoint 42°F (6°C)
Visibility 7.00 mi
Heat Index81°F (27°C)
Last update 8 Oct 2:54 pm CDT
Extended Forecast for

4 Miles E Brussels IL

  • Tonight

    Tonight: Clear, with a low around 55. Light east wind.

    Low: 55 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 90. Southeast wind 5 to 9 mph becoming south in the morning.

    High: 90 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 61. Southeast wind 5 to 7 mph.

    Low: 61 °F

    Clear

  • Saturday

    Saturday: Increasing clouds, with a high near 85. South wind 5 to 10 mph.

    High: 85 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 59. Southeast wind 5 to 8 mph.

    Low: 59 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Sunday

    Sunday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Columbus Day

    Columbus Day: Sunny, with a high near 93.

    High: 93 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

Detailed Forecast

Tonight
Clear, with a low around 55. Light east wind.
Friday
Sunny, with a high near 90. Southeast wind 5 to 9 mph becoming south in the morning.
Friday Night
Clear, with a low around 61. Southeast wind 5 to 7 mph.
Saturday
Increasing clouds, with a high near 85. South wind 5 to 10 mph.
Saturday Night
A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 59. Southeast wind 5 to 8 mph.
Sunday
Mostly sunny, with a high near 82.
Sunday Night
Mostly clear, with a low around 59.
Columbus Day
Sunny, with a high near 93.
Monday Night
Mostly clear, with a low around 66.
Tuesday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 86.
Tuesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 60.
Wednesday
A 20 percent chance of showers. Mostly sunny, with a high near 82.
Wednesday Night
A 40 percent chance of showers. Partly cloudy, with a low around 62.
Thursday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E Brussels IL
 38.94°N 90.53°W (Elev. 420 ft)
Last Update:
2:36 pm CDT Oct 8, 2026
Forecast Valid:
3pm CDT Oct 8, 2026-6pm CDT Oct 15, 2026
 
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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