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.

A Few Clouds

40°F

4°C

Humidity 77%
Wind Speed N 10 G 21 mph
Barometer 30.39 in (1028.7 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 27 Mar 8:54 am CDT
Extended Forecast for

4 Miles SW Carrollton IL

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 52. North wind around 17 mph, with gusts as high as 28 mph.

    High: 52 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Mostly clear, with a low around 27. North wind 6 to 11 mph, with gusts as high as 20 mph.

    Low: 27 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 54. Light and variable wind becoming south 5 to 10 mph in the morning.

    High: 54 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 40. South wind around 10 mph.

    Low: 40 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 67. South wind around 11 mph, with gusts as high as 21 mph.

    High: 67 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 63.

    Low: 63 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A slight chance of rain and thunderstorms, then a chance of rain after 1pm. Partly sunny, with a high near 84. Chance of precipitation is 30%.

    High: 84 °F

    Slight Chance
    T-storms then
    Chance Rain

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 52. North wind around 17 mph, with gusts as high as 28 mph.
Tonight
Mostly clear, with a low around 27. North wind 6 to 11 mph, with gusts as high as 20 mph.
Saturday
Sunny, with a high near 54. Light and variable wind becoming south 5 to 10 mph in the morning.
Saturday Night
Partly cloudy, with a low around 40. South wind around 10 mph.
Sunday
Mostly cloudy, with a high near 67. South wind around 11 mph, with gusts as high as 21 mph.
Sunday Night
Partly cloudy, with a low around 55.
Monday
Mostly sunny, with a high near 81.
Monday Night
A 20 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 63.
Tuesday
A slight chance of rain and thunderstorms, then a chance of rain after 1pm. Partly sunny, with a high near 84. Chance of precipitation is 30%.
Tuesday Night
A chance of rain, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 58. Chance of precipitation is 50%.
Wednesday
A 50 percent chance of rain and thunderstorms. Mostly cloudy, with a high near 73.
Wednesday Night
Rain and thunderstorms likely. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 50. Chance of precipitation is 70%.
Thursday
Rain and thunderstorms likely. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.
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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:
7:36 am CDT Mar 27, 2026
Forecast Valid:
9am CDT Mar 27, 2026-6pm CDT Apr 2, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation