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

26°F

-3°C

Humidity 55%
Wind Speed Calm
Barometer 30.27 in (1025.5 mb)
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Last update 28 Jan 7:54 pm CST
Extended Forecast for

4 Miles SW Carrollton IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 9. Calm wind becoming north around 5 mph after midnight.

    Low: 9 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 20 percent chance of snow after noon. Cloudy and cold, with a high near 19. Northeast wind 5 to 7 mph.

    High: 19 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Thursday Night

    Thursday Night: A 30 percent chance of snow, mainly before 9pm. Cloudy, then gradually becoming partly cloudy, with a low around 4. North wind 3 to 6 mph.

    Low: 4 °F

    Chance Snow
    then Mostly
    Cloudy

  • Friday

    Friday: Partly sunny and cold, with a high near 16. North wind 6 to 10 mph.

    High: 16 °F

    Cold

  • Friday Night

    Friday Night: Partly cloudy, with a low around 2. North wind 8 to 10 mph.

    Low: 2 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny and cold, with a high near 17.

    High: 17 °F

    Cold

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 0.

    Low: 0 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of snow after noon. Partly sunny, with a high near 26.

    High: 26 °F

    Mostly Sunny
    then Slight
    Chance Snow

  • Sunday Night

    Sunday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 14.

    Low: 14 °F

    Slight Chance
    Snow then
    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 9. Calm wind becoming north around 5 mph after midnight.
Thursday
A 20 percent chance of snow after noon. Cloudy and cold, with a high near 19. Northeast wind 5 to 7 mph.
Thursday Night
A 30 percent chance of snow, mainly before 9pm. Cloudy, then gradually becoming partly cloudy, with a low around 4. North wind 3 to 6 mph.
Friday
Partly sunny and cold, with a high near 16. North wind 6 to 10 mph.
Friday Night
Partly cloudy, with a low around 2. North wind 8 to 10 mph.
Saturday
Mostly sunny and cold, with a high near 17.
Saturday Night
Partly cloudy, with a low around 0.
Sunday
A 20 percent chance of snow after noon. Partly sunny, with a high near 26.
Sunday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 14.
Monday
Partly sunny, with a high near 33.
Monday Night
Mostly cloudy, with a low around 17.
Tuesday
Mostly cloudy, with a high near 35.
Tuesday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 24.
Wednesday
A chance of rain and snow. Mostly cloudy, with a high near 34. Chance of precipitation is 30%.
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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:
7:56 pm CST Jan 28, 2026
Forecast Valid:
8pm CST Jan 28, 2026-6pm CST Feb 4, 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