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

15°F

-9°C

Humidity 56%
Wind Speed W 13 mph
Barometer 30.29 in (1026.2 mb)
Dewpoint 2°F (-17°C)
Visibility 10.00 mi
Wind Chill1°F (-17°C)
Last update 17 Jan 11:54 pm CST
Extended Forecast for

St. Charles County Smartt Airport MO

  • Tonight

    Tonight: Partly cloudy, with a low around 11. West wind 7 to 11 mph, with gusts as high as 22 mph.

    Low: 11 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of flurries before 1pm, then a slight chance of snow between 1pm and 4pm, then a chance of flurries after 4pm. Increasing clouds, with a high near 33. Southwest wind 6 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.

    High: 33 °F

    Mostly Sunny
    then Slight
    Chance Snow

  • Sunday Night

    Sunday Night: A chance of flurries before 9pm. Mostly cloudy, then gradually becoming clear, with a low around 11. Northwest wind 13 to 18 mph, with gusts as high as 28 mph.

    Low: 11 °F

    Chance
    Flurries

  • M.L.King Day

    M.L.King Day: Sunny and cold, with a high near 20. Northwest wind 9 to 17 mph, with gusts as high as 26 mph.

    High: 20 °F

    Cold

  • Monday Night

    Monday Night: Mostly clear, with a low around 8. West wind 5 to 7 mph becoming southwest after midnight.

    Low: 8 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 36.

    High: 36 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 18.

    Low: 18 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 11. West wind 7 to 11 mph, with gusts as high as 22 mph.
Sunday
A chance of flurries before 1pm, then a slight chance of snow between 1pm and 4pm, then a chance of flurries after 4pm. Increasing clouds, with a high near 33. Southwest wind 6 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
Sunday Night
A chance of flurries before 9pm. Mostly cloudy, then gradually becoming clear, with a low around 11. Northwest wind 13 to 18 mph, with gusts as high as 28 mph.
M.L.King Day
Sunny and cold, with a high near 20. Northwest wind 9 to 17 mph, with gusts as high as 26 mph.
Monday Night
Mostly clear, with a low around 8. West wind 5 to 7 mph becoming southwest after midnight.
Tuesday
Mostly sunny, with a high near 36.
Tuesday Night
Partly cloudy, with a low around 25.
Wednesday
Mostly sunny, with a high near 41.
Wednesday Night
Partly cloudy, with a low around 18.
Thursday
Sunny, with a high near 36.
Thursday Night
Partly cloudy, with a low around 20.
Friday
A 20 percent chance of rain. Partly sunny, with a high near 41.
Friday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 17. Chance of precipitation is 20%.
Saturday
A 40 percent chance of snow. Mostly cloudy, with a high near 28.
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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:
9:36 pm CST Jan 17, 2026
Forecast Valid:
11pm CST Jan 17, 2026-6pm CST Jan 24, 2026
 
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Additional Resources

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