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

38°F

3°C

Humidity 62%
Wind Speed NW 7 mph
Barometer 30.28 in (1025.4 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 12 Mar 12:54 am CDT
Extended Forecast for

4 Miles SW Carrollton IL

  • Overnight

    Overnight: Clear, with a low around 29. Northwest wind 6 to 10 mph.

    Low: 29 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 53. West wind 5 to 14 mph, with gusts as high as 21 mph.

    High: 53 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 43. Breezy, with a south wind 14 to 22 mph, with gusts as high as 39 mph.

    Low: 43 °F

    Mostly Cloudy
    and Breezy

  • Friday

    Friday: Partly sunny, with a high near 57. Breezy, with a west wind 16 to 20 mph, with gusts as high as 32 mph.

    High: 57 °F

    Partly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 34. Northwest wind 5 to 8 mph becoming east after midnight.

    Low: 34 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 61.

    High: 61 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 51.

    Low: 51 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Sunday

    Sunday: Rain likely and possibly a thunderstorm, then rain after 1pm. High near 65. Breezy. Chance of precipitation is 90%.

    High: 65 °F

    Rain and
    Breezy

  • Sunday Night

    Sunday Night: Rain and snow likely before 1am, then a chance of snow. Mostly cloudy, with a low around 20. Blustery. Chance of precipitation is 60%.

    Low: 20 °F

    Rain/Snow
    Likely and
    Blustery

Detailed Forecast

Overnight
Clear, with a low around 29. Northwest wind 6 to 10 mph.
Thursday
Sunny, with a high near 53. West wind 5 to 14 mph, with gusts as high as 21 mph.
Thursday Night
Mostly cloudy, with a low around 43. Breezy, with a south wind 14 to 22 mph, with gusts as high as 39 mph.
Friday
Partly sunny, with a high near 57. Breezy, with a west wind 16 to 20 mph, with gusts as high as 32 mph.
Friday Night
Mostly cloudy, with a low around 34. Northwest wind 5 to 8 mph becoming east after midnight.
Saturday
Partly sunny, with a high near 61.
Saturday Night
A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 51.
Sunday
Rain likely and possibly a thunderstorm, then rain after 1pm. High near 65. Breezy. Chance of precipitation is 90%.
Sunday Night
Rain and snow likely before 1am, then a chance of snow. Mostly cloudy, with a low around 20. Blustery. Chance of precipitation is 60%.
Monday
Mostly sunny, with a high near 30. Blustery.
Monday Night
Mostly clear, with a low around 12.
Tuesday
Partly sunny, with a high near 36.
Tuesday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 27. Chance of precipitation is 20%.
Wednesday
Mostly cloudy, with a high near 55.
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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:
1:26 am CDT Mar 12, 2026
Forecast Valid:
1am CDT Mar 12, 2026-6pm CDT Mar 18, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation