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.

A Few Clouds

73°F

23°C

Humidity 69%
Wind Speed SW 8 mph
Barometer 29.79 in (1008.0 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 15 Apr 4:54 am CDT
Extended Forecast for

3 Miles WNW Brussels IL

  • Overnight

    Overnight: Scattered showers and thunderstorms. Mostly cloudy, with a low around 68. Southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    Low: 68 °F

    Scattered
    Showers

  • Wednesday

    Wednesday: Showers and thunderstorms likely, mainly after 3pm. Mostly cloudy, with a high near 81. Southwest wind 9 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.

    High: 81 °F

    Scattered
    T-storms then
    T-storms
    Likely

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms before 4am, then scattered showers. Low around 62. South wind 9 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    Low: 62 °F

    Showers

  • Thursday

    Thursday: Scattered showers before 1pm, then scattered showers and thunderstorms between 1pm and 4pm, then scattered showers after 4pm. Mostly sunny, with a high near 82. West wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    High: 82 °F

    Scattered
    Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 59. South wind 3 to 5 mph.

    Low: 59 °F

    Mostly Clear

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 51. Chance of precipitation is 80%.

    Low: 51 °F

    Showers

  • Saturday

    Saturday: A 40 percent chance of showers. Mostly sunny, with a high near 65.

    High: 65 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before 1am. Mostly clear, with a low around 40.

    Low: 40 °F

    Slight Chance
    Showers

Detailed Forecast

Overnight
Scattered showers and thunderstorms. Mostly cloudy, with a low around 68. Southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Wednesday
Showers and thunderstorms likely, mainly after 3pm. Mostly cloudy, with a high near 81. Southwest wind 9 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Wednesday Night
Showers and thunderstorms before 4am, then scattered showers. Low around 62. South wind 9 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Thursday
Scattered showers before 1pm, then scattered showers and thunderstorms between 1pm and 4pm, then scattered showers after 4pm. Mostly sunny, with a high near 82. West wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Thursday Night
Mostly clear, with a low around 59. South wind 3 to 5 mph.
Friday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87.
Friday Night
Showers and possibly a thunderstorm. Low around 51. Chance of precipitation is 80%.
Saturday
A 40 percent chance of showers. Mostly sunny, with a high near 65.
Saturday Night
A 20 percent chance of showers before 1am. Mostly clear, with a low around 40.
Sunday
Sunny, with a high near 62.
Sunday Night
Clear, with a low around 41.
Monday
Sunny, with a high near 72.
Monday Night
Mostly clear, with a low around 51.
Tuesday
Mostly sunny, with a high near 77.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Brussels IL
 38.96°N 90.64°W (Elev. 581 ft)
Last Update:
1:26 am CDT Apr 15, 2026
Forecast Valid:
5am CDT Apr 15, 2026-6pm CDT Apr 21, 2026
 
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