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

67°F

19°C

Humidity 87%
Wind Speed W 7 mph
Barometer 29.91 in (1012.2 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 18 Jun 9:54 pm CDT
Extended Forecast for

3 Miles ENE Brussels IL

Flood Warning until further notice
Click here for hazard details and duration
Flood Warning until further notice
  •  
    Flood Warning until further notice

    NOW until further notice

    Flood Warning

  • Tonight

    Low: 60 °F

    Partly Cloudy
    then Patchy
    Fog

  • Juneteenth

    Juneteenth: Patchy fog before 7am. Otherwise, mostly sunny, with a high near 83. Light northwest wind.

    High: 83 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 65. Light and variable wind.

    Low: 65 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 85. Light southwest wind.

    High: 85 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 67. Southeast wind around 5 mph. Chance of precipitation is 30%.

    Low: 67 °F

    Partly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 82. Chance of precipitation is 90%.

    High: 82 °F

    Showers
    Likely then
    T-storms

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 65. Chance of precipitation is 80%.

    Low: 65 °F

    Showers

  • Monday

    Monday: A 20 percent chance of showers before 1pm. Partly sunny, with a high near 78.

    High: 78 °F

    Slight Chance
    Showers

Detailed Forecast

Tonight
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 60. Light northwest wind.
Juneteenth
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 83. Light northwest wind.
Friday Night
Partly cloudy, with a low around 65. Light and variable wind.
Saturday
Mostly sunny, with a high near 85. Light southwest wind.
Saturday Night
A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 67. Southeast wind around 5 mph. Chance of precipitation is 30%.
Sunday
Showers and possibly a thunderstorm. High near 82. Chance of precipitation is 90%.
Sunday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 65. Chance of precipitation is 80%.
Monday
A 20 percent chance of showers before 1pm. Partly sunny, with a high near 78.
Monday Night
Partly cloudy, with a low around 60.
Tuesday
Mostly sunny, with a high near 80.
Tuesday Night
Partly cloudy, with a low around 63.
Wednesday
Mostly sunny, with a high near 82.
Wednesday Night
Partly cloudy, with a low around 63.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 82.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ENE Brussels IL
 38.98°N 90.53°W (Elev. 712 ft)
Last Update:
7:41 pm CDT Jun 18, 2026
Forecast Valid:
9pm CDT Jun 18, 2026-6pm CDT Jun 25, 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