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.

Overcast

38°F

3°C

Humidity 70%
Wind Speed N 15 G 23 mph
Barometer 30.31 in (1026.4 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 23 Mar 5:54 am CDT
Extended Forecast for

4 Miles SW Carrollton IL

  • Today

    Today: Mostly sunny, with a high near 54. North wind 9 to 11 mph, with gusts as high as 20 mph.

    High: 54 °F

    Mostly Sunny

  • Tonight

    Tonight: A chance of sprinkles after 2am. Mostly cloudy, with a low around 35. East wind 6 to 8 mph.

    Low: 35 °F

    Chance
    Sprinkles

  • Tuesday

    Tuesday: Mostly sunny, with a high near 60. Southeast wind 8 to 10 mph.

    High: 60 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 40. South wind around 7 mph.

    Low: 40 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 74. South wind 6 to 10 mph.

    High: 74 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 88.

    High: 88 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 40. Chance of precipitation is 70%.

    Low: 40 °F

    Showers
    Likely

  • Friday

    Friday: A 30 percent chance of showers before 1pm. Partly sunny, with a high near 51.

    High: 51 °F

    Chance
    Showers

Detailed Forecast

Today
Mostly sunny, with a high near 54. North wind 9 to 11 mph, with gusts as high as 20 mph.
Tonight
A chance of sprinkles after 2am. Mostly cloudy, with a low around 35. East wind 6 to 8 mph.
Tuesday
Mostly sunny, with a high near 60. Southeast wind 8 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 40. South wind around 7 mph.
Wednesday
Mostly sunny, with a high near 74. South wind 6 to 10 mph.
Wednesday Night
Mostly clear, with a low around 58.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 88.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 40. Chance of precipitation is 70%.
Friday
A 30 percent chance of showers before 1pm. Partly sunny, with a high near 51.
Friday Night
Partly cloudy, with a low around 29.
Saturday
Sunny, with a high near 56.
Saturday Night
Mostly clear, with a low around 35.
Sunday
Partly sunny, with a high near 62.
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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:
3:41 am CDT Mar 23, 2026
Forecast Valid:
6am CDT Mar 23, 2026-6pm CDT Mar 29, 2026
 
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