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.

Fog/Mist

15°F

-9°C

Humidity 95%
Wind Speed E 6 mph
Barometer 30.07 in (1018.9 mb)
Dewpoint 14°F (-10°C)
Visibility 2.50 mi
Wind Chill6°F (-14°C)
Last update 3 Dec 1:54 am CST
Extended Forecast for

2 Miles SW Brussels IL

  • Overnight

    Overnight: Partly cloudy, with a low around 18. Calm wind becoming south around 5 mph.

    Low: 18 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of rain and snow before 4pm, then a chance of snow between 4pm and 5pm, then rain likely after 5pm. Mostly cloudy, with a high near 38. South wind 5 to 7 mph becoming northwest in the afternoon. Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 38 °F

    Mostly Cloudy
    then
    Rain/Snow
    Likely

  • Wednesday Night

    Wednesday Night: Rain and snow likely before 2am, then a chance of flurries between 2am and 3am. Cloudy, with a low around 11. North wind 6 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 11 °F

    Rain/Snow
    Likely then
    Slight Chance
    Snow

  • Thursday

    Thursday: Sunny, with a high near 22. North wind 5 to 8 mph becoming calm in the afternoon.

    High: 22 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 10. Calm wind becoming south around 5 mph after midnight.

    Low: 10 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 38.

    High: 38 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 23.

    Low: 23 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 36.

    High: 36 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 24.

    Low: 24 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 18. Calm wind becoming south around 5 mph.
Wednesday
A chance of rain and snow before 4pm, then a chance of snow between 4pm and 5pm, then rain likely after 5pm. Mostly cloudy, with a high near 38. South wind 5 to 7 mph becoming northwest in the afternoon. Chance of precipitation is 60%. Little or no snow accumulation expected.
Wednesday Night
Rain and snow likely before 2am, then a chance of flurries between 2am and 3am. Cloudy, with a low around 11. North wind 6 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Thursday
Sunny, with a high near 22. North wind 5 to 8 mph becoming calm in the afternoon.
Thursday Night
Partly cloudy, with a low around 10. Calm wind becoming south around 5 mph after midnight.
Friday
Mostly sunny, with a high near 38.
Friday Night
Mostly cloudy, with a low around 23.
Saturday
Partly sunny, with a high near 36.
Saturday Night
Mostly cloudy, with a low around 24.
Sunday
A slight chance of rain and snow after noon. Mostly cloudy, with a high near 34. Chance of precipitation is 20%.
Sunday Night
Mostly cloudy, with a low around 21.
Monday
Partly sunny, with a high near 34.
Monday Night
Mostly cloudy, with a low around 26.
Tuesday
Mostly sunny, with a high near 42.
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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:
2:40 am CST Dec 3, 2025
Forecast Valid:
2am CST Dec 3, 2025-6pm CST Dec 9, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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