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.

Fair

53°F

12°C

Humidity 72%
Wind Speed W 6 mph
Barometer 30.05 in (1017.3 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Wind Chill51°F (11°C)
Last update 22 May 6:54 am CDT
Extended Forecast for

2 Miles SW Brussels IL

  • Today

    Today: Sunny, with a high near 68. Northwest wind 7 to 14 mph, with gusts as high as 25 mph.

    High: 68 °F

    Sunny

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, mostly cloudy, then gradually becoming clear, with a low around 45. Northwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.

    Low: 45 °F

    Partly Cloudy
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 8am. Otherwise, increasing clouds, with a high near 70. Light northwest wind.

    High: 70 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 54. Light and variable wind.

    Low: 54 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A 20 percent chance of showers. Partly sunny, with a high near 68. Southeast wind 5 to 8 mph.

    High: 68 °F

    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 1am, then showers and possibly a thunderstorm between 1am and 4am, then showers after 4am. Low around 55. Chance of precipitation is 80%.

    Low: 55 °F

    Chance
    Showers then
    Showers

  • Sunday

    Sunday: Showers likely before 7am, then showers likely and possibly a thunderstorm between 7am and 1pm, then showers likely after 1pm. Cloudy, with a high near 63. Chance of precipitation is 70%.

    High: 63 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm. Cloudy, with a low around 54. Chance of precipitation is 70%.

    Low: 54 °F

    Showers
    Likely

  • Memorial Day

    Memorial Day: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 62. Chance of precipitation is 60%.

    High: 62 °F

    Showers
    Likely

Detailed Forecast

Today
Sunny, with a high near 68. Northwest wind 7 to 14 mph, with gusts as high as 25 mph.
Tonight
Patchy fog after 3am. Otherwise, mostly cloudy, then gradually becoming clear, with a low around 45. Northwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.
Friday
Patchy fog before 8am. Otherwise, increasing clouds, with a high near 70. Light northwest wind.
Friday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 54. Light and variable wind.
Saturday
A 20 percent chance of showers. Partly sunny, with a high near 68. Southeast wind 5 to 8 mph.
Saturday Night
A chance of showers and thunderstorms before 1am, then showers and possibly a thunderstorm between 1am and 4am, then showers after 4am. Low around 55. Chance of precipitation is 80%.
Sunday
Showers likely before 7am, then showers likely and possibly a thunderstorm between 7am and 1pm, then showers likely after 1pm. Cloudy, with a high near 63. Chance of precipitation is 70%.
Sunday Night
Showers likely and possibly a thunderstorm. Cloudy, with a low around 54. Chance of precipitation is 70%.
Memorial Day
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 62. Chance of precipitation is 60%.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 53. Chance of precipitation is 40%.
Tuesday
A 30 percent chance of showers. Partly sunny, with a high near 67.
Tuesday Night
Partly cloudy, with a low around 52.
Wednesday
Mostly sunny, with a high near 73.
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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:
5:06 am CDT May 22, 2025
Forecast Valid:
7am CDT May 22, 2025-6pm CDT May 28, 2025
 
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