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.

Heavy Rain Fog/Mist

49°F

9°C

Humidity 97%
Wind Speed W 12 mph
Barometer 30.00 in (1015.9 mb)
Dewpoint 48°F (9°C)
Visibility 2.50 mi
Wind Chill44°F (7°C)
Last update 4 Mar 11:54 pm CST
Extended Forecast for

Carrollton IL

Dense Fog Advisory until March 5, 06:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until March 5, 06:00am

    NOW until 6:00am Thu

    Dense Fog Advisory

  • Overnight

    Low: 47 °F

    Showers and
    Areas Dense
    Fog

  • Thursday

    Thursday: A 30 percent chance of showers, mainly before 8am. Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 64. Northwest wind 5 to 7 mph becoming light and variable in the afternoon.

    High: 64 °F

    Chance
    Showers and
    Patchy Fog
    then Mostly
    Cloudy

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms, mainly after 2am. Mostly cloudy, with a low around 52. Light southeast wind increasing to 5 to 10 mph in the evening.

    Low: 52 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Scattered showers. Partly sunny, with a high near 77. South wind 10 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.

    High: 77 °F

    Scattered
    Showers

  • Friday Night

    Friday Night: Scattered showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 52. South wind 13 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.

    Low: 52 °F

    Scattered
    T-storms then
    Showers

  • Saturday

    Saturday: Scattered showers before noon. Mostly cloudy, with a high near 62. Chance of precipitation is 30%.

    High: 62 °F

    Scattered
    Showers then
    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

Detailed Forecast

Overnight
Showers and possibly a thunderstorm, mainly before 5am, then a chance of showers and thunderstorms after 5am. Areas of dense fog. Low around 47. West wind around 6 mph becoming east. Chance of precipitation is 90%.
Thursday
A 30 percent chance of showers, mainly before 8am. Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 64. Northwest wind 5 to 7 mph becoming light and variable in the afternoon.
Thursday Night
A 40 percent chance of showers and thunderstorms, mainly after 2am. Mostly cloudy, with a low around 52. Light southeast wind increasing to 5 to 10 mph in the evening.
Friday
Scattered showers. Partly sunny, with a high near 77. South wind 10 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.
Friday Night
Scattered showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 52. South wind 13 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.
Saturday
Scattered showers before noon. Mostly cloudy, with a high near 62. Chance of precipitation is 30%.
Saturday Night
Partly cloudy, with a low around 38.
Sunday
Sunny, with a high near 63.
Sunday Night
Mostly clear, with a low around 45.
Monday
Sunny, with a high near 75.
Monday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 58.
Tuesday
Showers and possibly a thunderstorm. High near 74. Chance of precipitation is 80%.
Tuesday Night
Showers. Low around 43. Chance of precipitation is 80%.
Wednesday
A 50 percent chance of showers. Mostly cloudy, with a high near 53.
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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:
10:26 pm CST Mar 4, 2026
Forecast Valid:
12am CST Mar 5, 2026-6pm CDT Mar 11, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation