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

77°F

25°C

Humidity 54%
Wind Speed S 13 mph
Barometer 29.74 in (1007.0 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 9 Mar 1:54 pm CDT
Extended Forecast for

4 Miles SW Carrollton IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 78. Southwest wind around 16 mph, with gusts as high as 28 mph.

    High: 78 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 59. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 59 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 81. South wind 8 to 17 mph, with gusts as high as 28 mph.

    High: 81 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 10pm. Low around 50. Southwest wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 90%.

    Low: 50 °F

    Showers
    Likely then
    T-storms

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. Temperature rising to near 58 by 10am, then falling to around 47 during the remainder of the day. Southwest wind 14 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 90%.

    High: 58 °F⇓

    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 30.

    Low: 30 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 52.

    High: 52 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 59.

    High: 59 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 78. Southwest wind around 16 mph, with gusts as high as 28 mph.
Tonight
Partly cloudy, with a low around 59. South wind around 10 mph, with gusts as high as 20 mph.
Tuesday
A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 81. South wind 8 to 17 mph, with gusts as high as 28 mph.
Tuesday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 10pm. Low around 50. Southwest wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 90%.
Wednesday
Showers and possibly a thunderstorm. Temperature rising to near 58 by 10am, then falling to around 47 during the remainder of the day. Southwest wind 14 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 90%.
Wednesday Night
Mostly cloudy, with a low around 30.
Thursday
Sunny, with a high near 52.
Thursday Night
Mostly cloudy, with a low around 42.
Friday
Mostly cloudy, with a high near 59.
Friday Night
Mostly cloudy, with a low around 38.
Saturday
Partly sunny, with a high near 68.
Saturday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 46.
Sunday
A 50 percent chance of rain. Mostly cloudy, with a high near 62. Breezy.
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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 pm CDT Mar 9, 2026
Forecast Valid:
2pm CDT Mar 9, 2026-6pm CDT Mar 15, 2026
 
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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