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

43°F

6°C

Humidity 63%
Wind Speed NE 5 mph
Barometer 30.31 in (1026.2 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 20 Apr 5:54 am CDT
Extended Forecast for

4 Miles SW Carrollton IL

  • Today

    Today: Sunny, with a high near 68. Light and variable wind becoming southeast 5 to 8 mph in the morning.

    High: 68 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 50. Southeast wind around 9 mph.

    Low: 50 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 79. Southwest wind 9 to 17 mph, with gusts as high as 26 mph.

    High: 79 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 55. Southwest wind 9 to 11 mph, with gusts as high as 21 mph.

    Low: 55 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 77. Southwest wind around 9 mph.

    High: 77 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 60. Chance of precipitation is 80%.

    Low: 60 °F

    Chance
    T-storms then
    Showers

  • Friday

    Friday: Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 72. Chance of precipitation is 70%.

    High: 72 °F

    Showers
    Likely

Detailed Forecast

Today
Sunny, with a high near 68. Light and variable wind becoming southeast 5 to 8 mph in the morning.
Tonight
Mostly clear, with a low around 50. Southeast wind around 9 mph.
Tuesday
Sunny, with a high near 79. Southwest wind 9 to 17 mph, with gusts as high as 26 mph.
Tuesday Night
Mostly clear, with a low around 55. Southwest wind 9 to 11 mph, with gusts as high as 21 mph.
Wednesday
Sunny, with a high near 77. Southwest wind around 9 mph.
Wednesday Night
Mostly clear, with a low around 57.
Thursday
Mostly sunny, with a high near 81.
Thursday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 60. Chance of precipitation is 80%.
Friday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 72. Chance of precipitation is 70%.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 49.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 70.
Saturday Night
A 30 percent chance of showers. Partly cloudy, with a low around 48.
Sunday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 70.
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:
6:01 am CDT Apr 20, 2026
Forecast Valid:
6am CDT Apr 20, 2026-6pm CDT Apr 26, 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