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.

Rain Fog/Mist

68°F

20°C

Humidity 93%
Wind Speed NE 3 mph
Barometer 30.01 in (1016.0 mb)
Dewpoint 66°F (19°C)
Visibility 1.75 mi
Last update 15 Oct 7:54 am CDT
Extended Forecast for

Carrollton IL

  • Today

    Today: Showers and possibly a thunderstorm, mainly before 1pm, then a chance of showers and thunderstorms after 1pm. Patchy fog between 9am and noon. High near 77. Southeast wind 6 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 90%.

    High: 77 °F

    Showers and
    Patchy Fog
    then Showers
    Likely

  • Tonight

    Tonight: Showers and thunderstorms likely before midnight, then isolated showers between midnight and 1am. Mostly cloudy, with a low around 44. Northwest wind 11 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.

    Low: 44 °F

    Showers
    Likely then
    Isolated
    Showers

  • Friday

    Friday: Isolated showers after 3pm. Partly sunny, with a high near 56. Breezy, with a northwest wind 17 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.

    High: 56 °F

    Breezy.
    Mostly Sunny
    then Isolated
    Showers

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 35. North wind 8 to 17 mph, with gusts as high as 26 mph.

    Low: 35 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny, with a high near 60. North wind around 5 mph becoming calm in the morning.

    High: 60 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 35.

    Low: 35 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

Detailed Forecast

Today
Showers and possibly a thunderstorm, mainly before 1pm, then a chance of showers and thunderstorms after 1pm. Patchy fog between 9am and noon. High near 77. Southeast wind 6 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 90%.
Tonight
Showers and thunderstorms likely before midnight, then isolated showers between midnight and 1am. Mostly cloudy, with a low around 44. Northwest wind 11 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.
Friday
Isolated showers after 3pm. Partly sunny, with a high near 56. Breezy, with a northwest wind 17 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 35. North wind 8 to 17 mph, with gusts as high as 26 mph.
Saturday
Sunny, with a high near 60. North wind around 5 mph becoming calm in the morning.
Saturday Night
Clear, with a low around 35.
Sunday
Sunny, with a high near 67.
Sunday Night
Mostly clear, with a low around 37.
Monday
Mostly sunny, with a high near 72.
Monday Night
Partly cloudy, with a low around 40.
Tuesday
Sunny, with a high near 74.
Tuesday Night
Mostly clear, with a low around 43.
Wednesday
Sunny, with a high near 77.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Carrollton IL
 39.31°N 90.4°W (Elev. 653 ft)
Last Update:
5:11 am CDT Oct 15, 2026
Forecast Valid:
8am CDT Oct 15, 2026-6pm CDT Oct 21, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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