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 32%
Wind Speed SE 13 mph
Barometer 30.17 in (1021.6 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill49°F (9°C)
Last update 12 Feb 4:54 pm CST
Extended Forecast for

4 Miles SW Carrollton IL

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 32. Southeast wind 5 to 8 mph.

    Low: 32 °F

    Decreasing
    Clouds

  • Friday

    Friday: Sunny, with a high near 57. South wind 5 to 8 mph.

    High: 57 °F

    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 35. South wind around 5 mph becoming calm in the evening.

    Low: 35 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Rain likely, mainly after noon. Cloudy, with a high near 51. Southeast wind 3 to 7 mph. Chance of precipitation is 70%.

    High: 51 °F

    Slight Chance
    Rain then
    Rain Likely

  • Saturday Night

    Saturday Night: Rain, mainly before midnight. Low around 42. East wind around 8 mph. Chance of precipitation is 80%.

    Low: 42 °F

    Rain then
    Chance Rain

  • Sunday

    Sunday: Mostly sunny, with a high near 57.

    High: 57 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 32. Southeast wind 5 to 8 mph.
Friday
Sunny, with a high near 57. South wind 5 to 8 mph.
Friday Night
Increasing clouds, with a low around 35. South wind around 5 mph becoming calm in the evening.
Saturday
Rain likely, mainly after noon. Cloudy, with a high near 51. Southeast wind 3 to 7 mph. Chance of precipitation is 70%.
Saturday Night
Rain, mainly before midnight. Low around 42. East wind around 8 mph. Chance of precipitation is 80%.
Sunday
Mostly sunny, with a high near 57.
Sunday Night
Mostly clear, with a low around 35.
Washington's Birthday
Mostly sunny, with a high near 60.
Monday Night
Mostly cloudy, with a low around 43.
Tuesday
Mostly cloudy, with a high near 64.
Tuesday Night
Mostly cloudy, with a low around 53.
Wednesday
Partly sunny, with a high near 68.
Wednesday Night
A 20 percent chance of rain. Partly cloudy, with a low around 42.
Thursday
A 20 percent chance of rain. Mostly sunny, with a high near 59.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Carrollton IL
 39.25°N 90.46°W (Elev. 600 ft)
Last Update:
5:11 pm CST Feb 12, 2026
Forecast Valid:
5pm CST Feb 12, 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