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

59°F

15°C

Humidity 67%
Wind Speed W 9 mph
Barometer 29.79 in (1008.6 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 4 Nov 2:54 pm CST
Extended Forecast for

Carrollton IL

  • Tonight

    Tonight: Cloudy during the early evening, then gradual clearing, with a low around 44. Southwest wind 6 to 8 mph.

    Low: 44 °F

    Gradual
    Clearing

  • Thursday

    Thursday: Increasing clouds, with a high near 60. Southwest wind 8 to 13 mph, with gusts as high as 20 mph.

    High: 60 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Isolated showers between 9pm and 10pm. Mostly cloudy, with a low around 42. Northwest wind 5 to 8 mph. Chance of precipitation is 20%.

    Low: 42 °F

    Isolated
    Showers then
    Mostly Cloudy

  • Friday

    Friday: Cloudy through mid morning, then gradual clearing, with a high near 53. North wind 7 to 10 mph.

    High: 53 °F

    Gradual
    Clearing

  • Friday Night

    Friday Night: Mostly clear, with a low around 30. North wind around 6 mph becoming calm in the evening.

    Low: 30 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 54.

    High: 54 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 30.

    Low: 30 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 33.

    Low: 33 °F

    Clear

Detailed Forecast

Tonight
Cloudy during the early evening, then gradual clearing, with a low around 44. Southwest wind 6 to 8 mph.
Thursday
Increasing clouds, with a high near 60. Southwest wind 8 to 13 mph, with gusts as high as 20 mph.
Thursday Night
Isolated showers between 9pm and 10pm. Mostly cloudy, with a low around 42. Northwest wind 5 to 8 mph. Chance of precipitation is 20%.
Friday
Cloudy through mid morning, then gradual clearing, with a high near 53. North wind 7 to 10 mph.
Friday Night
Mostly clear, with a low around 30. North wind around 6 mph becoming calm in the evening.
Saturday
Sunny, with a high near 54.
Saturday Night
Mostly clear, with a low around 30.
Sunday
Sunny, with a high near 59.
Sunday Night
Clear, with a low around 33.
Monday
Sunny, with a high near 65.
Monday Night
Clear, with a low around 37.
Tuesday
Sunny, with a high near 65.
Tuesday Night
Mostly clear, with a low around 38.
Veterans Day
Mostly sunny, with a high near 66.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Carrollton IL
 39.31°N 90.4°W (Elev. 653 ft)
Last Update:
2:21 pm CST Nov 4, 2026
Forecast Valid:
3pm CST Nov 4, 2026-6pm CST Nov 11, 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