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

32°F

0°C

Humidity 61%
Wind Speed NW 6 mph
Barometer 30.68 in (1039.2 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Wind Chill26°F (-3°C)
Last update 28 Mar 7:54 am CDT
Extended Forecast for

2 Miles SW Brussels IL

Freeze Warning March 28, 08:40am until March 28, 09:00am
Click here for hazard details and duration
...
  •  
    Freeze Warning March 28, 08:40am until March 28, 09:00am

    NOW until 9:00am Sat

    Freeze Warning

  • Today

    High: 57 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 41. South wind 8 to 10 mph.

    Low: 41 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 70. South wind 8 to 13 mph, with gusts as high as 22 mph.

    High: 70 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 58. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 58 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 84. South wind 10 to 16 mph, with gusts as high as 26 mph.

    High: 84 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 66.

    Low: 66 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of rain and thunderstorms, then rain likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 85. Chance of precipitation is 60%.

    High: 85 °F

    Chance Rain
    then Rain
    Likely

  • Tuesday Night

    Tuesday Night: Rain and possibly a thunderstorm. Low around 46. Chance of precipitation is 90%.

    Low: 46 °F

    Rain

Detailed Forecast

Today
Sunny, with a high near 57. Calm wind becoming south 5 to 8 mph in the morning.
Tonight
Mostly clear, with a low around 41. South wind 8 to 10 mph.
Sunday
Partly sunny, with a high near 70. South wind 8 to 13 mph, with gusts as high as 22 mph.
Sunday Night
Partly cloudy, with a low around 58. South wind around 10 mph, with gusts as high as 20 mph.
Monday
Sunny, with a high near 84. South wind 10 to 16 mph, with gusts as high as 26 mph.
Monday Night
Partly cloudy, with a low around 66.
Tuesday
A chance of rain and thunderstorms, then rain likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 85. Chance of precipitation is 60%.
Tuesday Night
Rain and possibly a thunderstorm. Low around 46. Chance of precipitation is 90%.
Wednesday
A 50 percent chance of rain. Cloudy, with a high near 56.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 39.
Thursday
A 50 percent chance of rain. Mostly cloudy, with a high near 56.
Thursday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 44.
Friday
A 40 percent chance of rain. Mostly cloudy, with a high near 69.
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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:
8:16 am CDT Mar 28, 2026
Forecast Valid:
8am CDT Mar 28, 2026-6pm CDT Apr 3, 2026
 
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