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

51°F

11°C

Humidity 71%
Wind Speed SE 5 mph
Barometer 30.08 in (1018.5 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Wind Chill49°F (9°C)
Last update 16 Feb 9:54 am CST
Extended Forecast for

4 Miles SW Carrollton IL

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 64. South wind around 10 mph, with gusts as high as 21 mph.

    High: 64 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 42. South wind around 8 mph.

    Low: 42 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 63. South wind 8 to 16 mph, with gusts as high as 28 mph.

    High: 63 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after midnight. Cloudy, then gradually becoming partly cloudy, with a low around 54. South wind 16 to 18 mph, with gusts as high as 32 mph.

    Low: 54 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: Sunny, with a high near 69. Southwest wind 9 to 16 mph, with gusts as high as 28 mph.

    High: 69 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly sunny, with a high near 69. Chance of precipitation is 30%.

    High: 69 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before midnight. Mostly clear, with a low around 35.

    Low: 35 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of showers after noon. Partly sunny, with a high near 48.

    High: 48 °F

    Partly Sunny
    then Slight
    Chance
    Showers

Detailed Forecast

Washington's Birthday
Mostly sunny, with a high near 64. South wind around 10 mph, with gusts as high as 21 mph.
Tonight
Partly cloudy, with a low around 42. South wind around 8 mph.
Tuesday
Mostly cloudy, with a high near 63. South wind 8 to 16 mph, with gusts as high as 28 mph.
Tuesday Night
A 20 percent chance of showers after midnight. Cloudy, then gradually becoming partly cloudy, with a low around 54. South wind 16 to 18 mph, with gusts as high as 32 mph.
Wednesday
Sunny, with a high near 69. Southwest wind 9 to 16 mph, with gusts as high as 28 mph.
Wednesday Night
Partly cloudy, with a low around 43.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly sunny, with a high near 69. Chance of precipitation is 30%.
Thursday Night
A 20 percent chance of showers before midnight. Mostly clear, with a low around 35.
Friday
A 20 percent chance of showers after noon. Partly sunny, with a high near 48.
Friday Night
A 20 percent chance of showers. Partly cloudy, with a low around 29.
Saturday
A 30 percent chance of showers. Partly sunny, with a high near 47.
Saturday Night
A 30 percent chance of showers. Partly cloudy, with a low around 26.
Sunday
A 20 percent chance of showers. Mostly sunny, with a high near 39.
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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:
6:01 am CST Feb 16, 2026
Forecast Valid:
10am CST Feb 16, 2026-6pm CST Feb 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation