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.

Mostly Cloudy

24°F

-4°C

Humidity 81%
Wind Speed SE 6 mph
Barometer 30.14 in (1021.3 mb)
Dewpoint 19°F (-7°C)
Visibility 7.00 mi
Wind Chill17°F (-8°C)
Last update 5 Feb 9:54 am CST
Extended Forecast for

St. Charles County Smartt Airport MO

  • Today

    Today: Partly sunny, with a high near 39. South wind 6 to 10 mph.

    High: 39 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 27. South wind 5 to 9 mph becoming west in the evening.

    Low: 27 °F

    Partly Cloudy

  • Friday

    Friday: Increasing clouds, with a high near 45. Breezy, with a west wind 11 to 20 mph becoming northwest in the afternoon. Winds could gust as high as 32 mph.

    High: 45 °F

    Mostly Sunny
    and Breezy
    then Mostly
    Cloudy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 21. Northwest wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 21 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 36. Northeast wind 5 to 8 mph becoming southeast in the afternoon.

    High: 36 °F

    Mostly Sunny

  • Saturday Night

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

    Low: 23 °F

    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 54.

    High: 54 °F

    Sunny

  • Sunday Night

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

    Low: 29 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

Detailed Forecast

Today
Partly sunny, with a high near 39. South wind 6 to 10 mph.
Tonight
Partly cloudy, with a low around 27. South wind 5 to 9 mph becoming west in the evening.
Friday
Increasing clouds, with a high near 45. Breezy, with a west wind 11 to 20 mph becoming northwest in the afternoon. Winds could gust as high as 32 mph.
Friday Night
Partly cloudy, with a low around 21. Northwest wind 5 to 15 mph, with gusts as high as 25 mph.
Saturday
Mostly sunny, with a high near 36. Northeast wind 5 to 8 mph becoming southeast in the afternoon.
Saturday Night
Mostly cloudy, with a low around 23.
Sunday
Sunny, with a high near 54.
Sunday Night
Mostly clear, with a low around 29.
Monday
Sunny, with a high near 59.
Monday Night
Mostly clear, with a low around 38.
Tuesday
A 20 percent chance of rain. Partly sunny, with a high near 62.
Tuesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 38.
Wednesday
A 30 percent chance of rain. Mostly cloudy, with a high near 54.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
St. Charles County Smartt Airport MO
 38.94°N 90.45°W (Elev. 427 ft)
Last Update:
10:51 am CST Feb 5, 2026
Forecast Valid:
10am CST Feb 5, 2026-6pm CST Feb 11, 2026
 
Forecast Discussion
 
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Additional Resources

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