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

30°F

-1°C

Humidity 66%
Wind Speed SE 3 mph
Barometer 30.28 in (1025.8 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Last update 8 Dec 1:54 pm CST
Extended Forecast for

2 Miles SW Brussels IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 33. Light and variable wind.

    High: 33 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a temperature rising to around 33 by 4am. Southeast wind 5 to 9 mph becoming southwest after midnight.

    Low: 28 °F⇑

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 52. Southwest wind 9 to 14 mph, with gusts as high as 22 mph.

    High: 52 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 38. Breezy, with a southwest wind 15 to 22 mph, with gusts as high as 32 mph.

    Low: 38 °F

    Mostly Cloudy
    and Breezy

  • Wednesday

    Wednesday: Partly sunny, with a temperature falling to around 36 by 5pm. Breezy, with a northwest wind 14 to 24 mph, with gusts as high as 39 mph.

    High: 45 °F⇓

    Partly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 25.

    Low: 25 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 20 percent chance of snow before noon. Mostly cloudy, with a high near 37.

    High: 37 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 25.

    Low: 25 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 33.

    High: 33 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Sunny, with a high near 33. Light and variable wind.
Tonight
Increasing clouds, with a temperature rising to around 33 by 4am. Southeast wind 5 to 9 mph becoming southwest after midnight.
Tuesday
Mostly sunny, with a high near 52. Southwest wind 9 to 14 mph, with gusts as high as 22 mph.
Tuesday Night
Mostly cloudy, with a low around 38. Breezy, with a southwest wind 15 to 22 mph, with gusts as high as 32 mph.
Wednesday
Partly sunny, with a temperature falling to around 36 by 5pm. Breezy, with a northwest wind 14 to 24 mph, with gusts as high as 39 mph.
Wednesday Night
Mostly cloudy, with a low around 25.
Thursday
A 20 percent chance of snow before noon. Mostly cloudy, with a high near 37.
Thursday Night
Mostly cloudy, with a low around 25.
Friday
Mostly cloudy, with a high near 33.
Friday Night
Mostly cloudy, with a low around 12.
Saturday
Partly sunny, with a high near 23.
Saturday Night
Mostly cloudy, with a low around 13.
Sunday
Mostly sunny, with a high near 28.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Brussels IL
 38.92°N 90.62°W (Elev. 502 ft)
Last Update:
2:11 pm CST Dec 8, 2025
Forecast Valid:
2pm CST Dec 8, 2025-6pm CST Dec 14, 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