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

69°F

21°C

Humidity 63%
Wind Speed S 18 mph
Barometer 29.81 in (1009.3 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 9 Mar 11:54 am CDT
Extended Forecast for

Carrollton IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 77. Southwest wind around 17 mph, with gusts as high as 26 mph.

    High: 77 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 58. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 58 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers between 3pm and 4pm, then a slight 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. Chance of precipitation is 20%.

    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 49. Southwest wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%.

    Low: 49 °F

    Showers
    Likely then
    T-storms

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. Temperature rising to near 57 by 10am, then falling to around 47 during the remainder of the day. Breezy, with a southwest wind 14 to 20 mph becoming northwest in the morning. Winds could gust as high as 31 mph. Chance of precipitation is 90%.

    High: 57 °F⇓

    Showers and
    Breezy

  • Wednesday Night

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

    Low: 30 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 53.

    High: 53 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 60.

    High: 60 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 77. Southwest wind around 17 mph, with gusts as high as 26 mph.
Tonight
Partly cloudy, with a low around 58. South wind around 10 mph, with gusts as high as 20 mph.
Tuesday
A slight chance of showers between 3pm and 4pm, then a slight 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. Chance of precipitation is 20%.
Tuesday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 10pm. Low around 49. Southwest wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%.
Wednesday
Showers and possibly a thunderstorm. Temperature rising to near 57 by 10am, then falling to around 47 during the remainder of the day. Breezy, with a southwest wind 14 to 20 mph becoming northwest in the morning. Winds could gust as high as 31 mph. Chance of precipitation is 90%.
Wednesday Night
Partly cloudy, with a low around 30.
Thursday
Mostly sunny, with a high near 53.
Thursday Night
Mostly cloudy, with a low around 41.
Friday
Partly sunny, with a high near 60.
Friday Night
Mostly cloudy, with a low around 36.
Saturday
Partly sunny, with a high near 63.
Saturday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 44.
Sunday
A 50 percent chance of rain and thunderstorms. Mostly cloudy, with a high near 65.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Carrollton IL
 39.29°N 90.4°W (Elev. 568 ft)
Last Update:
11:31 am CDT Mar 9, 2026
Forecast Valid:
12pm CDT Mar 9, 2026-6pm CDT Mar 15, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation