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.

Overcast

57°F

14°C

Humidity 67%
Wind Speed SE 3 mph
Barometer 29.84 in (1010.3 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 6 Nov 9:54 pm CST
Extended Forecast for

3 Miles NNW Brussels IL

  • Tonight

    Tonight: A slight chance of rain between 1am and 3am. Mostly cloudy, with a low around 55. Southeast wind 6 to 9 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 20%.

    Low: 55 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Friday

    Friday: Mostly cloudy through mid morning, then gradual clearing, with a high near 70. West wind 8 to 13 mph, with gusts as high as 21 mph.

    High: 70 °F

    Becoming
    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 42. West wind around 6 mph becoming calm after midnight.

    Low: 42 °F

    Increasing
    Clouds

  • Saturday

    Saturday: A 40 percent chance of rain after noon. Mostly cloudy, with a high near 65. Light and variable wind becoming west 5 to 10 mph in the afternoon.

    High: 65 °F

    Partly Sunny
    then Chance
    Rain

  • Saturday Night

    Saturday Night: A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 32. West wind 10 to 14 mph becoming northwest after midnight. Winds could gust as high as 24 mph.

    Low: 32 °F

    Chance Rain
    then Mostly
    Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 40.

    High: 40 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 24.

    Low: 24 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 42.

    High: 42 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 27.

    Low: 27 °F

    Mostly Clear

Detailed Forecast

Tonight
A slight chance of rain between 1am and 3am. Mostly cloudy, with a low around 55. Southeast wind 6 to 9 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Friday
Mostly cloudy through mid morning, then gradual clearing, with a high near 70. West wind 8 to 13 mph, with gusts as high as 21 mph.
Friday Night
Increasing clouds, with a low around 42. West wind around 6 mph becoming calm after midnight.
Saturday
A 40 percent chance of rain after noon. Mostly cloudy, with a high near 65. Light and variable wind becoming west 5 to 10 mph in the afternoon.
Saturday Night
A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 32. West wind 10 to 14 mph becoming northwest after midnight. Winds could gust as high as 24 mph.
Sunday
Mostly sunny, with a high near 40.
Sunday Night
Mostly clear, with a low around 24.
Monday
Sunny, with a high near 42.
Monday Night
Mostly clear, with a low around 27.
Veterans Day
Mostly sunny, with a high near 56.
Tuesday Night
Mostly clear, with a low around 43.
Wednesday
Sunny, with a high near 63.
Wednesday Night
Mostly clear, with a low around 39.
Thursday
Mostly sunny, with a high near 61.
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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:
9:56 pm CST Nov 6, 2025
Forecast Valid:
10pm CST Nov 6, 2025-6pm CST Nov 13, 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