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.

Fog/Mist

46°F

8°C

Humidity 86%
Wind Speed N 8 mph
Barometer 30.15 in (1020.9 mb)
Dewpoint 42°F (6°C)
Visibility 5.00 mi
Wind Chill42°F (6°C)
Last update 22 Nov 9:54 am CST
Extended Forecast for

Carrollton IL

  • Today

    Today: Mostly sunny, with a high near 55. Light and variable wind becoming west 5 to 7 mph in the afternoon.

    High: 55 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 39. Southwest wind 6 to 8 mph becoming northwest after midnight.

    Low: 39 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 56. Northwest wind around 6 mph becoming calm in the morning.

    High: 56 °F

    Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 39. Calm wind becoming southeast around 6 mph after midnight.

    Low: 39 °F

    Increasing
    Clouds

  • Monday

    Monday: Showers likely, mainly after noon. Cloudy, with a high near 55. Southeast wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    High: 55 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Monday Night

    Monday Night: Showers, mainly before midnight. Low around 47. Chance of precipitation is 90%.

    Low: 47 °F

    Showers then
    Slight Chance
    Showers

  • Tuesday

    Tuesday: A 20 percent chance of showers. Partly sunny, with a high near 60.

    High: 60 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 32.

    Low: 32 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 45.

    High: 45 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 55. Light and variable wind becoming west 5 to 7 mph in the afternoon.
Tonight
Mostly clear, with a low around 39. Southwest wind 6 to 8 mph becoming northwest after midnight.
Sunday
Sunny, with a high near 56. Northwest wind around 6 mph becoming calm in the morning.
Sunday Night
Increasing clouds, with a low around 39. Calm wind becoming southeast around 6 mph after midnight.
Monday
Showers likely, mainly after noon. Cloudy, with a high near 55. Southeast wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Monday Night
Showers, mainly before midnight. Low around 47. Chance of precipitation is 90%.
Tuesday
A 20 percent chance of showers. Partly sunny, with a high near 60.
Tuesday Night
Partly cloudy, with a low around 32.
Wednesday
Mostly sunny, with a high near 45.
Wednesday Night
Partly cloudy, with a low around 25.
Thanksgiving Day
Mostly sunny, with a high near 43.
Thursday Night
Partly cloudy, with a low around 24.
Friday
Mostly sunny, with a high near 42.
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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:
9:06 am CST Nov 22, 2025
Forecast Valid:
10am CST Nov 22, 2025-6pm CST Nov 28, 2025
 
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