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

8°F

-13°C

Humidity 80%
Wind Speed Calm
Barometer 30.11 in (1020.3 mb)
Dewpoint 3°F (-16°C)
Visibility 10.00 mi
Last update 5 Dec 5:54 am CST
Extended Forecast for

Carrollton IL

  • Today

    Today: Sunny, with a high near 38. Calm wind becoming south 5 to 9 mph in the morning.

    High: 38 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 27. South wind around 7 mph becoming west after midnight.

    Low: 27 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 34. Northwest wind around 5 mph becoming calm.

    High: 34 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 50 percent chance of snow, mainly after midnight. Cloudy, with a low around 26. East wind around 7 mph.

    Low: 26 °F

    Slight Chance
    Snow then
    Chance Snow

  • Sunday

    Sunday: A chance of rain and snow before 9am, then a chance of snow between 9am and noon. Mostly cloudy, with a temperature falling to around 26 by 5pm. Southeast wind 7 to 13 mph becoming north in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 40%.

    High: 34 °F⇓

    Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 7.

    Low: 7 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 28.

    High: 28 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 18.

    Low: 18 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 38. Calm wind becoming south 5 to 9 mph in the morning.
Tonight
Mostly cloudy, with a low around 27. South wind around 7 mph becoming west after midnight.
Saturday
Mostly cloudy, with a high near 34. Northwest wind around 5 mph becoming calm.
Saturday Night
A 50 percent chance of snow, mainly after midnight. Cloudy, with a low around 26. East wind around 7 mph.
Sunday
A chance of rain and snow before 9am, then a chance of snow between 9am and noon. Mostly cloudy, with a temperature falling to around 26 by 5pm. Southeast wind 7 to 13 mph becoming north in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 40%.
Sunday Night
Mostly cloudy, with a low around 7.
Monday
Mostly sunny, with a high near 28.
Monday Night
Partly cloudy, with a low around 18.
Tuesday
Mostly sunny, with a high near 41.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
A 30 percent chance of rain. Mostly cloudy, with a high near 42.
Wednesday Night
Mostly cloudy, with a low around 17.
Thursday
Mostly cloudy, with a high near 29.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Carrollton IL
 39.29°N 90.4°W (Elev. 568 ft)
Last Update:
6:36 am CST Dec 5, 2025
Forecast Valid:
6am CST Dec 5, 2025-6pm CST Dec 11, 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