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

40°F

4°C

Humidity 45%
Wind Speed N 7 mph
Barometer 30.63 in (1037.2 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 28 Mar 12:54 am CDT
Extended Forecast for

Brussels IL

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

    NOW until 9:00am Sat

    Freeze Warning

  • Overnight

    Low: 29 °F

    Mostly Clear

  • Saturday

    Saturday: Widespread frost before 8am. Otherwise, sunny, with a high near 56. Calm wind becoming south 5 to 9 mph in the morning.

    High: 56 °F

    Frost then
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 40. South wind around 9 mph.

    Low: 40 °F

    Partly Cloudy

  • 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 57. South wind around 10 mph.

    Low: 57 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

  • Monday Night

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

    Low: 66 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of rain, then a chance of rain and thunderstorms after 1pm. Partly sunny, with a high near 85. Chance of precipitation is 40%.

    High: 85 °F

    Slight Chance
    Rain then
    Chance
    T-storms

Detailed Forecast

Overnight
Mostly clear, with a low around 29. North wind around 6 mph.
Saturday
Widespread frost before 8am. Otherwise, sunny, with a high near 56. Calm wind becoming south 5 to 9 mph in the morning.
Saturday Night
Partly cloudy, with a low around 40. South wind around 9 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 57. South wind around 10 mph.
Monday
Mostly sunny, with a high near 83.
Monday Night
Partly cloudy, with a low around 66.
Tuesday
A slight chance of rain, then a chance of rain and thunderstorms after 1pm. Partly sunny, with a high near 85. Chance of precipitation is 40%.
Tuesday Night
Rain likely, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 47. Chance of precipitation is 70%.
Wednesday
A 50 percent chance of rain and thunderstorms. Mostly cloudy, with a high near 61.
Wednesday Night
Rain and thunderstorms likely. Mostly cloudy, with a low around 42. Chance of precipitation is 60%.
Thursday
Rain and thunderstorms likely. Mostly cloudy, with a high near 57. Chance of precipitation is 60%.
Thursday Night
A 40 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 46.
Friday
A 40 percent chance of rain and thunderstorms. Partly sunny, with a high near 70.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Brussels IL
 38.96°N 90.59°W (Elev. 499 ft)
Last Update:
12:51 am CDT Mar 28, 2026
Forecast Valid:
1am CDT Mar 28, 2026-6pm CDT Apr 3, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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