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.

Overcast

24°F

-4°C

Humidity 71%
Wind Speed NE 3 mph
Barometer 30.36 in (1028.5 mb)
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Last update 8 Dec 9:54 am CST
Extended Forecast for

4 Miles SW Carrollton IL

  • Today

    Today: Cloudy early, then gradual clearing, with a high near 30. Calm wind becoming south around 5 mph in the afternoon.

    High: 30 °F

    Gradual
    Clearing

  • Tonight

    Tonight: Mostly cloudy, with a temperature rising to around 33 by 5am. Southeast wind 5 to 11 mph.

    Low: 26 °F⇑

    Mostly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 47. Southwest wind around 10 mph, with gusts as high as 22 mph.

    High: 47 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 39. South wind 11 to 17 mph becoming west after midnight. Winds could gust as high as 31 mph.

    Low: 39 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a temperature falling to around 34 by 5pm. Breezy, with a northwest wind 15 to 20 mph decreasing to 9 to 14 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 42 °F⇓

    Mostly Cloudy
    and Breezy
    then Partly
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 23.

    Low: 23 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 20 percent chance of snow before noon. Mostly cloudy, with a high near 34.

    High: 34 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 19.

    Low: 19 °F

    Mostly Cloudy

  • Friday

    Friday: A 20 percent chance of snow before noon. Partly sunny, with a high near 27.

    High: 27 °F

    Slight Chance
    Snow then
    Partly Sunny

Detailed Forecast

Today
Cloudy early, then gradual clearing, with a high near 30. Calm wind becoming south around 5 mph in the afternoon.
Tonight
Mostly cloudy, with a temperature rising to around 33 by 5am. Southeast wind 5 to 11 mph.
Tuesday
Increasing clouds, with a high near 47. Southwest wind around 10 mph, with gusts as high as 22 mph.
Tuesday Night
Mostly cloudy, with a low around 39. South wind 11 to 17 mph becoming west after midnight. Winds could gust as high as 31 mph.
Wednesday
Mostly cloudy, with a temperature falling to around 34 by 5pm. Breezy, with a northwest wind 15 to 20 mph decreasing to 9 to 14 mph in the afternoon. Winds could gust as high as 30 mph.
Wednesday Night
Mostly cloudy, with a low around 23.
Thursday
A 20 percent chance of snow before noon. Mostly cloudy, with a high near 34.
Thursday Night
Mostly cloudy, with a low around 19.
Friday
A 20 percent chance of snow before noon. Partly sunny, with a high near 27.
Friday Night
Mostly cloudy, with a low around 5.
Saturday
Partly sunny and cold, with a high near 16.
Saturday Night
Mostly cloudy, with a low around 7.
Sunday
Mostly sunny, with a high near 24.
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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:
9:21 am CST Dec 8, 2025
Forecast Valid:
10am CST Dec 8, 2025-6pm CST Dec 14, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

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Chance of Precipitation