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.

Overcast

25°F

-4°C

Humidity 81%
Wind Speed S 10 mph
Barometer 30.10 in (1019.9 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Wind Chill15°F (-9°C)
Last update 2 Dec 7:54 pm CST
Extended Forecast for

Carrollton IL

  • Tonight

    Tonight: Partly cloudy, with a low around 17. South wind around 7 mph.

    Low: 17 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 36. South wind around 7 mph becoming northwest in the afternoon.

    High: 36 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 30 percent chance of snow, mainly between 9pm and midnight. Mostly cloudy, with a low around 8. North wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 8 °F

    Chance Snow

  • Thursday

    Thursday: Sunny and cold, with a high near 18. North wind 5 to 7 mph becoming calm in the afternoon.

    High: 18 °F

    Cold

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 6. Calm wind becoming south around 6 mph after midnight.

    Low: 6 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 33.

    High: 33 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 18.

    Low: 18 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 32.

    High: 32 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 20.

    Low: 20 °F

    Mostly Cloudy
    then Slight
    Chance Snow

Detailed Forecast

Tonight
Partly cloudy, with a low around 17. South wind around 7 mph.
Wednesday
Mostly cloudy, with a high near 36. South wind around 7 mph becoming northwest in the afternoon.
Wednesday Night
A 30 percent chance of snow, mainly between 9pm and midnight. Mostly cloudy, with a low around 8. North wind 8 to 10 mph, with gusts as high as 20 mph.
Thursday
Sunny and cold, with a high near 18. North wind 5 to 7 mph becoming calm in the afternoon.
Thursday Night
Partly cloudy, with a low around 6. Calm wind becoming south around 6 mph after midnight.
Friday
Mostly sunny, with a high near 33.
Friday Night
Mostly cloudy, with a low around 18.
Saturday
Partly sunny, with a high near 32.
Saturday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 20.
Sunday
A 20 percent chance of snow. Mostly cloudy, with a high near 31.
Sunday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 15.
Monday
Partly sunny, with a high near 31.
Monday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 23.
Tuesday
Partly sunny, with a high near 38.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Carrollton IL
 39.29°N 90.4°W (Elev. 568 ft)
Last Update:
4:51 pm CST Dec 2, 2025
Forecast Valid:
8pm CST Dec 2, 2025-6pm CST Dec 9, 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