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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

3 Miles WNW Carrollton IL

  • Tonight

    Tonight: Mostly clear, with a low around 27. South wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 27 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 54. South wind 6 to 8 mph.

    High: 54 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Cloudy, then gradually becoming partly cloudy, with a low around 43. Southeast wind 7 to 9 mph becoming southwest after midnight.

    Low: 43 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 58. West wind 7 to 10 mph, with gusts as high as 20 mph.

    High: 58 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 34. West wind around 6 mph becoming calm in the evening.

    Low: 34 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain after midnight. Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy
    then Slight
    Chance Rain

  • Thursday

    Thursday: Rain likely, mainly after noon. Mostly cloudy, with a high near 55. Chance of precipitation is 60%.

    High: 55 °F

    Chance Rain
    then Rain
    Likely

  • Thursday Night

    Thursday Night: Rain likely, mainly before midnight. Mostly cloudy, with a low around 42. Chance of precipitation is 60%.

    Low: 42 °F

    Rain Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 27. South wind 6 to 10 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 54. South wind 6 to 8 mph.
Monday Night
Cloudy, then gradually becoming partly cloudy, with a low around 43. Southeast wind 7 to 9 mph becoming southwest after midnight.
Tuesday
Mostly sunny, with a high near 58. West wind 7 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 34. West wind around 6 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 59.
Wednesday Night
A 20 percent chance of rain after midnight. Partly cloudy, with a low around 44.
Thursday
Rain likely, mainly after noon. Mostly cloudy, with a high near 55. Chance of precipitation is 60%.
Thursday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 42. Chance of precipitation is 60%.
Friday
A 30 percent chance of rain. Partly sunny, with a high near 51.
Friday Night
A 20 percent chance of rain. Partly cloudy, with a low around 32.
Saturday
Mostly sunny, with a high near 42.
Saturday Night
Partly cloudy, with a low around 22.
Sunday
Mostly sunny, with a high near 38.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Carrollton IL
 39.29°N 90.46°W (Elev. 607 ft)
Last Update:
8:32 pm CST Jan 4, 2026
Forecast Valid:
8pm CST Jan 4, 2026-6pm CST Jan 11, 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