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

55°F

13°C

Humidity 37%
Wind Speed SE 9 mph
Barometer 30.15 in (1021.0 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill53°F (12°C)
Last update 24 Mar 11:54 pm CDT
Extended Forecast for

4 Miles SW Carrollton IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 41. Southeast wind around 7 mph.

    Low: 41 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 77. Southeast wind 6 to 11 mph becoming south in the afternoon. Winds could gust as high as 21 mph.

    High: 77 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of showers before 10pm, then a slight chance of showers and thunderstorms between 10pm and 11pm. Partly cloudy, with a low around 61. South wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

    Low: 61 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Thursday

    Thursday: A 20 percent chance of rain after 1pm. Mostly sunny, with a high near 89. Southwest wind 10 to 15 mph, with gusts as high as 26 mph.

    High: 89 °F

    Sunny then
    Slight Chance
    Rain

  • Thursday Night

    Thursday Night: Rain. Low around 41. West wind 10 to 18 mph becoming north after midnight. Winds could gust as high as 29 mph. Chance of precipitation is 80%.

    Low: 41 °F

    Rain

  • Friday

    Friday: A 20 percent chance of rain before 1pm. Partly sunny, with a high near 50.

    High: 50 °F

    Slight Chance
    Rain

  • Friday Night

    Friday Night: Mostly clear, with a low around 29.

    Low: 29 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 41. Southeast wind around 7 mph.
Wednesday
Mostly sunny, with a high near 77. Southeast wind 6 to 11 mph becoming south in the afternoon. Winds could gust as high as 21 mph.
Wednesday Night
A slight chance of showers before 10pm, then a slight chance of showers and thunderstorms between 10pm and 11pm. Partly cloudy, with a low around 61. South wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Thursday
A 20 percent chance of rain after 1pm. Mostly sunny, with a high near 89. Southwest wind 10 to 15 mph, with gusts as high as 26 mph.
Thursday Night
Rain. Low around 41. West wind 10 to 18 mph becoming north after midnight. Winds could gust as high as 29 mph. Chance of precipitation is 80%.
Friday
A 20 percent chance of rain before 1pm. Partly sunny, with a high near 50.
Friday Night
Mostly clear, with a low around 29.
Saturday
Sunny, with a high near 57.
Saturday Night
Partly cloudy, with a low around 39.
Sunday
Partly sunny, with a high near 63.
Sunday Night
Mostly cloudy, with a low around 48.
Monday
Mostly sunny, with a high near 79.
Monday Night
A 30 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 56.
Tuesday
A 40 percent chance of rain and thunderstorms. Partly sunny, with a high near 77.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Carrollton IL
 39.25°N 90.46°W (Elev. 600 ft)
Last Update:
12:06 am CDT Mar 25, 2026
Forecast Valid:
12am CDT Mar 25, 2026-6pm CDT Mar 31, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation