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.

Fair

68°F

20°C

Humidity 76%
Wind Speed SW 6 mph
Barometer 29.94 in (1013.4 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 13 Apr 3:54 am CDT
Extended Forecast for

4 Miles SW Carrollton IL

  • Today

    Today: A slight chance of showers and thunderstorms between 2pm and 3pm. Mostly sunny, with a high near 84. South wind 9 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    High: 84 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: Partly cloudy, with a low around 67. South wind 13 to 17 mph, with gusts as high as 31 mph.

    Low: 67 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms before 11am, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. Southwest wind 11 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 30%.

    High: 86 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 4am, then showers likely after 4am. Mostly cloudy, with a low around 67. Southwest wind 11 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.

    Low: 67 °F

    Chance
    T-storms then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers, with thunderstorms also possible after 10am. High near 78. Southwest wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.

    High: 78 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 60. Chance of precipitation is 70%.

    Low: 60 °F

    Showers
    Likely

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 82.

    High: 82 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 86.

    High: 86 °F

    Partly Sunny
    then Chance
    Showers

Detailed Forecast

Today
A slight chance of showers and thunderstorms between 2pm and 3pm. Mostly sunny, with a high near 84. South wind 9 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Tonight
Partly cloudy, with a low around 67. South wind 13 to 17 mph, with gusts as high as 31 mph.
Tuesday
A slight chance of showers and thunderstorms before 11am, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. Southwest wind 11 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 30%.
Tuesday Night
A chance of showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 4am, then showers likely after 4am. Mostly cloudy, with a low around 67. Southwest wind 11 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Wednesday
Showers, with thunderstorms also possible after 10am. High near 78. Southwest wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 60. Chance of precipitation is 70%.
Thursday
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 82.
Thursday Night
Mostly clear, with a low around 59.
Friday
A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 86.
Friday Night
Showers and possibly a thunderstorm. Low around 56. Chance of precipitation is 80%.
Saturday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 70.
Saturday Night
A 20 percent chance of showers. Partly cloudy, with a low around 40.
Sunday
Sunny, with a high near 63.
Basemap Options
Click map to change the forecast location
Loading map...
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:
4:46 am CDT Apr 13, 2026
Forecast Valid:
4am CDT Apr 13, 2026-6pm CDT Apr 19, 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