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 100%
Wind Speed E 6 mph
Barometer 29.72 in (1006.3 mb)
Dewpoint 48°F (9°C)
Visibility 0.25 mi
Wind Chill45°F (7°C)
Last update 26 Dec 4:54 am CST
Extended Forecast for

Brussels IL

  • Today

    Today: Mostly cloudy, with a high near 65. Southwest wind 6 to 10 mph becoming northwest in the afternoon.

    High: 65 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 45. Calm wind becoming southeast around 5 mph after midnight.

    Low: 45 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 65. Southeast wind 6 to 10 mph.

    High: 65 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 30 percent chance of rain, mainly after midnight. Cloudy, with a low around 58. South wind 6 to 9 mph.

    Low: 58 °F

    Chance Rain

  • Sunday

    Sunday: Rain and possibly a thunderstorm. High near 69. South wind 6 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 90%.

    High: 69 °F

    Rain

  • Sunday Night

    Sunday Night: A chance of rain, mixing with snow after 9pm, then gradually ending. Mostly cloudy, with a low around 21. Blustery. Chance of precipitation is 40%.

    Low: 21 °F

    Blustery.
    Chance
    Rain/Snow
    then Partly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 28. Blustery.

    High: 28 °F

    Mostly Sunny
    and Blustery

  • Monday Night

    Monday Night: Mostly clear, with a low around 18.

    Low: 18 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 37.

    High: 37 °F

    Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 65. Southwest wind 6 to 10 mph becoming northwest in the afternoon.
Tonight
Mostly cloudy, with a low around 45. Calm wind becoming southeast around 5 mph after midnight.
Saturday
Mostly cloudy, with a high near 65. Southeast wind 6 to 10 mph.
Saturday Night
A 30 percent chance of rain, mainly after midnight. Cloudy, with a low around 58. South wind 6 to 9 mph.
Sunday
Rain and possibly a thunderstorm. High near 69. South wind 6 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 90%.
Sunday Night
A chance of rain, mixing with snow after 9pm, then gradually ending. Mostly cloudy, with a low around 21. Blustery. Chance of precipitation is 40%.
Monday
Mostly sunny, with a high near 28. Blustery.
Monday Night
Mostly clear, with a low around 18.
Tuesday
Sunny, with a high near 37.
Tuesday Night
Partly cloudy, with a low around 26.
Wednesday
Partly sunny, with a high near 39.
Wednesday Night
Partly cloudy, with a low around 21.
New Year's Day
Partly sunny, with a high near 35.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Brussels IL
 38.96°N 90.59°W (Elev. 499 ft)
Last Update:
3:41 am CST Dec 26, 2025
Forecast Valid:
4am CST Dec 26, 2025-6pm CST Jan 1, 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