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.

Fair

23°F

-5°C

Humidity 65%
Wind Speed SE 5 mph
Barometer 30.16 in (1021.5 mb)
Dewpoint 13°F (-11°C)
Visibility 10.00 mi
Wind Chill17°F (-8°C)
Last update 24 Feb 3:54 am CST
Extended Forecast for

3 Miles NNW Brussels IL

  • Today

    Today: Mostly cloudy, with a high near 57. South wind 10 to 18 mph becoming southwest in the afternoon. Winds could gust as high as 34 mph.

    High: 57 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 33. West wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 21 mph.

    Low: 33 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 51. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 51 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after midnight. Mostly cloudy, with a low around 35. East wind 5 to 7 mph. Chance of precipitation is 60%.

    Low: 35 °F

    Rain Likely

  • Thursday

    Thursday: A 20 percent chance of rain before noon. Partly sunny, with a high near 49. East wind 5 to 8 mph becoming northwest in the afternoon.

    High: 49 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 33.

    Low: 33 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 57. South wind 10 to 18 mph becoming southwest in the afternoon. Winds could gust as high as 34 mph.
Tonight
Mostly cloudy, with a low around 33. West wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 21 mph.
Wednesday
Partly sunny, with a high near 51. Calm wind becoming northeast around 5 mph in the afternoon.
Wednesday Night
Rain likely, mainly after midnight. Mostly cloudy, with a low around 35. East wind 5 to 7 mph. Chance of precipitation is 60%.
Thursday
A 20 percent chance of rain before noon. Partly sunny, with a high near 49. East wind 5 to 8 mph becoming northwest in the afternoon.
Thursday Night
Mostly clear, with a low around 33.
Friday
Sunny, with a high near 65.
Friday Night
Mostly clear, with a low around 39.
Saturday
Sunny, with a high near 64.
Saturday Night
Partly cloudy, with a low around 30.
Sunday
A chance of rain and snow. Partly sunny, with a high near 43. Chance of precipitation is 30%.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 30. Chance of precipitation is 40%.
Monday
A chance of rain and snow. Mostly cloudy, with a high near 47. Chance of precipitation is 40%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Brussels IL
 39.01°N 90.61°W (Elev. 610 ft)
Last Update:
4:15 am CST Feb 24, 2026
Forecast Valid:
4am CST Feb 24, 2026-6pm CST Mar 2, 2026
 
Forecast Discussion
 
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Additional Resources

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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