National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

55°F

13°C

Humidity 25%
Wind Speed SW 20 G 32 mph
Barometer 29.58 in (1001.8 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 24 Feb 2:54 pm CST
Extended Forecast for

St. Charles County Smartt Airport MO

  • Tonight

    Tonight: Mostly cloudy, with a low around 31. Southwest wind 6 to 11 mph becoming light and variable after midnight.

    Low: 31 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 52. Calm wind becoming north around 6 mph in the afternoon.

    High: 52 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 32. East wind 5 to 7 mph.

    Low: 32 °F

    Chance Rain

  • Thursday

    Thursday: A 20 percent chance of rain before noon. Partly sunny, with a high near 52. East wind 5 to 7 mph becoming northwest in the afternoon.

    High: 52 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 31. Calm wind becoming southwest around 5 mph after midnight.

    Low: 31 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Saturday Night

    Saturday Night: A slight chance of rain and snow. Partly cloudy, with a low around 29. Chance of precipitation is 20%.

    Low: 29 °F

    Slight Chance
    Rain/Snow

Detailed Forecast

Tonight
Mostly cloudy, with a low around 31. Southwest wind 6 to 11 mph becoming light and variable after midnight.
Wednesday
Partly sunny, with a high near 52. Calm wind becoming north around 6 mph in the afternoon.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 32. East wind 5 to 7 mph.
Thursday
A 20 percent chance of rain before noon. Partly sunny, with a high near 52. East wind 5 to 7 mph becoming northwest in the afternoon.
Thursday Night
Mostly clear, with a low around 31. Calm wind becoming southwest around 5 mph after midnight.
Friday
Sunny, with a high near 67.
Friday Night
Mostly clear, with a low around 38.
Saturday
Sunny, with a high near 63.
Saturday Night
A slight chance of rain and snow. Partly cloudy, with a low around 29. Chance of precipitation is 20%.
Sunday
A slight chance of rain before noon, then a chance of rain and snow. Mostly cloudy, with a high near 45. Chance of precipitation is 40%.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 28. Chance of precipitation is 40%.
Monday
A 30 percent chance of rain. Mostly cloudy, with a high near 47.
Monday Night
A 30 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 29.
Tuesday
A 50 percent chance of rain. Mostly cloudy, with a high near 51.
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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:
3:36 pm CST Feb 24, 2026
Forecast Valid:
3pm CST Feb 24, 2026-6pm CST Mar 3, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation