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

56°F

13°C

Humidity 87%
Wind Speed E 3 mph
Barometer 30.12 in (1019.7 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 29 Oct 4:54 am CDT
Extended Forecast for

Carrollton IL

  • Today

    Today: Isolated showers after 3pm. Mostly sunny, with a high near 78. South wind 5 to 7 mph becoming northwest in the afternoon. Chance of precipitation is 20%.

    High: 78 °F

    Sunny then
    Isolated
    Showers

  • Tonight

    Tonight: Isolated showers after 4am. Partly cloudy, with a low around 54. North wind around 5 mph becoming light and variable. Chance of precipitation is 20%.

    Low: 54 °F

    Partly Cloudy
    then Isolated
    Showers

  • Friday

    Friday: Partly sunny, with a high near 74. Southeast wind around 7 mph.

    High: 74 °F

    Partly Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 57. East wind 3 to 5 mph.

    Low: 57 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Mostly cloudy, with a high near 72. East wind 3 to 5 mph.

    High: 72 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 40 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 54.

    Low: 54 °F

    Chance
    Showers

  • Sunday

    Sunday: A 20 percent chance of showers before 1pm. Partly sunny, with a high near 72.

    High: 72 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 52.

    Low: 52 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Monday

    Monday: A 50 percent chance of showers. Mostly cloudy, with a high near 71.

    High: 71 °F

    Chance
    Showers

Detailed Forecast

Today
Isolated showers after 3pm. Mostly sunny, with a high near 78. South wind 5 to 7 mph becoming northwest in the afternoon. Chance of precipitation is 20%.
Tonight
Isolated showers after 4am. Partly cloudy, with a low around 54. North wind around 5 mph becoming light and variable. Chance of precipitation is 20%.
Friday
Partly sunny, with a high near 74. Southeast wind around 7 mph.
Friday Night
Increasing clouds, with a low around 57. East wind 3 to 5 mph.
Saturday
Mostly cloudy, with a high near 72. East wind 3 to 5 mph.
Saturday Night
A 40 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 54.
Sunday
A 20 percent chance of showers before 1pm. Partly sunny, with a high near 72.
Sunday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 52.
Monday
A 50 percent chance of showers. Mostly cloudy, with a high near 71.
Monday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 55. Chance of precipitation is 60%.
Tuesday
Showers likely. Mostly cloudy, with a high near 72. Chance of precipitation is 70%.
Tuesday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 51.
Wednesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 67.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Carrollton IL
 39.29°N 90.4°W (Elev. 568 ft)
Last Update:
4:46 am CDT Oct 29, 2026
Forecast Valid:
5am CDT Oct 29, 2026-6pm CST Nov 4, 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