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

58°F

14°C

Humidity 60%
Wind Speed Calm
Barometer 29.90 in (1012.1 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 20 Mar 11:54 pm CDT
Extended Forecast for

Kane ILSimilar City Names

  • Overnight

    Overnight: Mostly clear, with a low around 49. East wind 3 to 5 mph.

    Low: 49 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 84. East wind 5 to 7 mph becoming southwest in the afternoon.

    High: 84 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 62. South wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 62 °F

    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 82. Southwest wind 10 to 18 mph becoming north in the afternoon. Winds could gust as high as 26 mph.

    High: 82 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 37. Breezy, with a north wind 14 to 20 mph, with gusts as high as 31 mph.

    Low: 37 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Clear

  • Monday

    Monday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Monday Night

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

    Low: 39 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 60.

    High: 60 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain and thunderstorms after 1am. Mostly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

Detailed Forecast

Overnight
Mostly clear, with a low around 49. East wind 3 to 5 mph.
Saturday
Sunny, with a high near 84. East wind 5 to 7 mph becoming southwest in the afternoon.
Saturday Night
Mostly clear, with a low around 62. South wind 6 to 10 mph, with gusts as high as 20 mph.
Sunday
Increasing clouds, with a high near 82. Southwest wind 10 to 18 mph becoming north in the afternoon. Winds could gust as high as 26 mph.
Sunday Night
Partly cloudy, with a low around 37. Breezy, with a north wind 14 to 20 mph, with gusts as high as 31 mph.
Monday
Sunny, with a high near 56.
Monday Night
Partly cloudy, with a low around 39.
Tuesday
Partly sunny, with a high near 60.
Tuesday Night
A 20 percent chance of rain and thunderstorms after 1am. Mostly cloudy, with a low around 41.
Wednesday
Mostly cloudy, with a high near 66.
Wednesday Night
Partly cloudy, with a low around 51.
Thursday
A 20 percent chance of rain. Sunny, with a high near 77.
Thursday Night
A 40 percent chance of rain. Partly cloudy, with a low around 38.
Friday
A 20 percent chance of rain. Partly sunny, with a high near 52.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Kane ILSimilar City Names
 39.2°N 90.35°W (Elev. 551 ft)
Last Update:
10:26 pm CDT Mar 20, 2026
Forecast Valid:
12am CDT Mar 21, 2026-6pm CDT Mar 27, 2026
 
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Additional Resources

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