National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fog

47°F

8°C

Humidity 100%
Wind Speed Calm
Barometer 30.02 in (1016.5 mb)
Dewpoint 47°F (8°C)
Visibility 0.25 mi
Last update 24 Dec 8:54 pm CST
Extended Forecast for

3 Miles N Carrollton IL

Dense Fog Advisory until December 25, 10:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until December 25, 10:00am

    NOW until 10:00am Thu

    Dense Fog Advisory

  • Tonight

    Low: 47 °F

    Dense Fog

  • Christmas Day

    Christmas Day: Widespread dense fog, mainly before 9am. Otherwise, cloudy, with a high near 60. Light and variable wind becoming east around 6 mph in the morning.

    High: 60 °F

    Dense Fog
    then Mostly
    Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 53. East wind around 7 mph becoming southwest after midnight.

    Low: 53 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 65. Southwest wind 5 to 10 mph becoming northwest in the afternoon.

    High: 65 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 43. Light and variable wind.

    Low: 43 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 63.

    High: 63 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 50.

    Low: 50 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 50 percent chance of rain. Mostly cloudy, with a high near 55.

    High: 55 °F

    Chance Rain

Detailed Forecast

Tonight
Widespread dense fog, mainly before 2am. Otherwise, cloudy, with a low around 47. Light and variable wind.
Christmas Day
Widespread dense fog, mainly before 9am. Otherwise, cloudy, with a high near 60. Light and variable wind becoming east around 6 mph in the morning.
Thursday Night
Mostly cloudy, with a low around 53. East wind around 7 mph becoming southwest after midnight.
Friday
Mostly sunny, with a high near 65. Southwest wind 5 to 10 mph becoming northwest in the afternoon.
Friday Night
Partly cloudy, with a low around 43. Light and variable wind.
Saturday
Partly sunny, with a high near 63.
Saturday Night
Mostly cloudy, with a low around 50.
Sunday
A 50 percent chance of rain. Mostly cloudy, with a high near 55.
Sunday Night
A slight chance of rain and snow before midnight. Mostly cloudy, with a low around 17. Blustery. Chance of precipitation is 20%.
Monday
Sunny, with a high near 26.
Monday Night
Mostly clear, with a low around 15.
Tuesday
Mostly sunny, with a high near 33.
Tuesday Night
Mostly clear, with a low around 21.
Wednesday
Mostly sunny, with a high near 37.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles N Carrollton IL
 39.33°N 90.4°W (Elev. 600 ft)
Last Update:
9:31 pm CST Dec 24, 2025
Forecast Valid:
9pm CST Dec 24, 2025-6pm CST Dec 31, 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