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

30°F

-1°C

Humidity 82%
Wind Speed E 7 mph
Barometer 30.20 in (1022.8 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill23°F (-5°C)
Last update 13 Feb 5:54 am CST
Extended Forecast for

3 Miles WNW Brussels IL

  • Today

    Today: Sunny, with a high near 60. Light and variable wind becoming south 5 to 7 mph in the morning.

    High: 60 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 39. Southeast wind 3 to 5 mph.

    Low: 39 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Rain, mainly after 10am. High near 51. East wind 3 to 8 mph. Chance of precipitation is 90%.

    High: 51 °F

    Rain

  • Saturday Night

    Saturday Night: Rain. Low around 43. East wind around 7 mph. Chance of precipitation is 90%.

    Low: 43 °F

    Rain then
    Rain Likely

  • Sunday

    Sunday: A 20 percent chance of rain before noon. Mostly sunny, with a high near 57. Northeast wind 5 to 8 mph.

    High: 57 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 44.

    Low: 44 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 65.

    High: 65 °F

    Mostly Cloudy

Detailed Forecast

Today
Sunny, with a high near 60. Light and variable wind becoming south 5 to 7 mph in the morning.
Tonight
Increasing clouds, with a low around 39. Southeast wind 3 to 5 mph.
Saturday
Rain, mainly after 10am. High near 51. East wind 3 to 8 mph. Chance of precipitation is 90%.
Saturday Night
Rain. Low around 43. East wind around 7 mph. Chance of precipitation is 90%.
Sunday
A 20 percent chance of rain before noon. Mostly sunny, with a high near 57. Northeast wind 5 to 8 mph.
Sunday Night
Mostly clear, with a low around 37.
Washington's Birthday
Mostly sunny, with a high near 62.
Monday Night
Mostly cloudy, with a low around 44.
Tuesday
Mostly cloudy, with a high near 65.
Tuesday Night
Mostly cloudy, with a low around 54.
Wednesday
Partly sunny, with a high near 70.
Wednesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 45.
Thursday
A 20 percent chance of rain. Mostly sunny, with a high near 63.
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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:
5:31 am CST Feb 13, 2026
Forecast Valid:
6am CST Feb 13, 2026-6pm CST Feb 19, 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