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

40°F

4°C

Humidity 45%
Wind Speed W 16 G 24 mph
Barometer 30.08 in (1018.8 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 21 Jan 9:54 am CST
Extended Forecast for

4 Miles SW Carrollton IL

  • Today

    Today: Sunny, with a high near 42. West wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 42 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 20. Southwest wind 5 to 14 mph becoming northwest in the evening. Winds could gust as high as 25 mph.

    Low: 20 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 36. West wind 3 to 7 mph.

    High: 36 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 4. Light and variable wind becoming north 12 to 17 mph in the evening. Winds could gust as high as 25 mph.

    Low: 4 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy and cold, with a high near 10. North wind 11 to 16 mph, with gusts as high as 26 mph.

    High: 10 °F

    Cold

  • Friday Night

    Friday Night: Mostly cloudy, with a low around -2.

    Low: -2 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 40 percent chance of snow, mainly after noon. Cloudy and cold, with a high near 11.

    High: 11 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A 50 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 5.

    Low: 5 °F

    Chance Snow
    then Slight
    Chance Snow

  • Sunday

    Sunday: A 20 percent chance of snow before noon. Partly sunny and cold, with a high near 18.

    High: 18 °F

    Slight Chance
    Snow then
    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 42. West wind 10 to 15 mph, with gusts as high as 25 mph.
Tonight
Partly cloudy, with a low around 20. Southwest wind 5 to 14 mph becoming northwest in the evening. Winds could gust as high as 25 mph.
Thursday
Partly sunny, with a high near 36. West wind 3 to 7 mph.
Thursday Night
Mostly cloudy, with a low around 4. Light and variable wind becoming north 12 to 17 mph in the evening. Winds could gust as high as 25 mph.
Friday
Mostly cloudy and cold, with a high near 10. North wind 11 to 16 mph, with gusts as high as 26 mph.
Friday Night
Mostly cloudy, with a low around -2.
Saturday
A 40 percent chance of snow, mainly after noon. Cloudy and cold, with a high near 11.
Saturday Night
A 50 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 5.
Sunday
A 20 percent chance of snow before noon. Partly sunny and cold, with a high near 18.
Sunday Night
Partly cloudy, with a low around 2.
Monday
Sunny, with a high near 21.
Monday Night
Mostly clear, with a low around 8.
Tuesday
Mostly sunny, with a high near 33.
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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:
8:47 am CST Jan 21, 2026
Forecast Valid:
10am CST Jan 21, 2026-6pm CST Jan 27, 2026
 
Forecast Discussion
 
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Additional Resources

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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