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

69°F

21°C

Humidity 45%
Wind Speed SE 13 mph
Barometer 30.15 in (1020.9 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 4 Nov 11:54 am CST
Extended Forecast for

Brussels IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 72. South wind 8 to 14 mph, with gusts as high as 24 mph.

    High: 72 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 52. South wind around 8 mph.

    Low: 52 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: Sunny, with a high near 68. Southwest wind 7 to 15 mph becoming north in the afternoon. Winds could gust as high as 23 mph.

    High: 68 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 37. North wind around 6 mph becoming light and variable.

    Low: 37 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 65. Southeast wind 6 to 15 mph, with gusts as high as 25 mph.

    High: 65 °F

    Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 55.

    Low: 55 °F

    Mostly Cloudy
    then Chance
    Rain

  • Friday

    Friday: A 20 percent chance of rain before noon. Mostly sunny, with a high near 69.

    High: 69 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 72. South wind 8 to 14 mph, with gusts as high as 24 mph.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around 52. South wind around 8 mph.
Wednesday
Sunny, with a high near 68. Southwest wind 7 to 15 mph becoming north in the afternoon. Winds could gust as high as 23 mph.
Wednesday Night
Mostly clear, with a low around 37. North wind around 6 mph becoming light and variable.
Thursday
Sunny, with a high near 65. Southeast wind 6 to 15 mph, with gusts as high as 25 mph.
Thursday Night
A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 55.
Friday
A 20 percent chance of rain before noon. Mostly sunny, with a high near 69.
Friday Night
Mostly clear, with a low around 41.
Saturday
Mostly sunny, with a high near 65.
Saturday Night
Partly cloudy, with a low around 39.
Sunday
Sunny, with a high near 49.
Sunday Night
Mostly clear, with a low around 28.
Monday
Sunny, with a high near 46.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Brussels IL
 38.94°N 90.59°W (Elev. 505 ft)
Last Update:
11:01 am CST Nov 4, 2025
Forecast Valid:
12pm CST Nov 4, 2025-6pm CST Nov 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