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

54°F

12°C

Humidity 90%
Wind Speed W 8 mph
Barometer 29.85 in (1010.6 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 25 Nov 10:54 am CST
Extended Forecast for

St. Charles County Smartt Airport MO

  • Today

    Today: Cloudy, with a high near 58. West wind 7 to 10 mph.

    High: 58 °F

    Cloudy

  • Tonight

    Tonight: Scattered showers between 7pm and 8pm. Cloudy during the early evening, then gradual clearing, with a low around 35. West wind 9 to 18 mph, with gusts as high as 34 mph. Chance of precipitation is 30%.

    Low: 35 °F

    Scattered
    Showers then
    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 45. Breezy, with a west wind 13 to 21 mph, with gusts as high as 36 mph.

    High: 45 °F

    Mostly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 25. West wind 8 to 10 mph.

    Low: 25 °F

    Partly Cloudy

  • Thanksgiving Day

    Thanksgiving Day: Sunny, with a high near 41. Northwest wind 8 to 14 mph.

    High: 41 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 20.

    Low: 20 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 39.

    High: 39 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Snow likely, mainly after midnight. Cloudy, with a low around 28. Chance of precipitation is 60%.

    Low: 28 °F

    Chance Snow
    then Snow
    Likely

  • Saturday

    Saturday: Rain and snow. High near 40. Chance of precipitation is 80%.

    High: 40 °F

    Rain/Snow

Detailed Forecast

Today
Cloudy, with a high near 58. West wind 7 to 10 mph.
Tonight
Scattered showers between 7pm and 8pm. Cloudy during the early evening, then gradual clearing, with a low around 35. West wind 9 to 18 mph, with gusts as high as 34 mph. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a high near 45. Breezy, with a west wind 13 to 21 mph, with gusts as high as 36 mph.
Wednesday Night
Partly cloudy, with a low around 25. West wind 8 to 10 mph.
Thanksgiving Day
Sunny, with a high near 41. Northwest wind 8 to 14 mph.
Thursday Night
Mostly clear, with a low around 20.
Friday
Mostly sunny, with a high near 39.
Friday Night
Snow likely, mainly after midnight. Cloudy, with a low around 28. Chance of precipitation is 60%.
Saturday
Rain and snow. High near 40. Chance of precipitation is 80%.
Saturday Night
Rain likely, mainly before midnight. Cloudy, with a low around 27. Chance of precipitation is 60%.
Sunday
A 40 percent chance of rain. Mostly cloudy, with a high near 39.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 25. Chance of precipitation is 40%.
Monday
A 40 percent chance of rain. Mostly cloudy, with a high near 38.
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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:
9:21 am CST Nov 25, 2025
Forecast Valid:
11am CST Nov 25, 2025-6pm CST Dec 1, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation