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.

Overcast

45°F

7°C

Humidity 61%
Wind Speed S 5 mph
Barometer 29.66 in (1004.6 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 24 Feb 9:54 pm CST
Extended Forecast for

4 Miles S St. Charles County Smartt Airport MO

  • Tonight

    Tonight: A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 34. West wind 5 to 8 mph becoming calm after midnight.

    Low: 34 °F

    Slight Chance
    Rain then
    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 35. East wind around 6 mph.

    Low: 35 °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 north in the afternoon.

    High: 52 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 34. Calm wind becoming south around 5 mph after midnight.

    Low: 34 °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 40.

    Low: 40 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Saturday Night

    Saturday Night: A slight chance of rain and snow. Partly cloudy, with a low around 32. Chance of precipitation is 20%.

    Low: 32 °F

    Slight Chance
    Rain/Snow

Detailed Forecast

Tonight
A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 34. West wind 5 to 8 mph becoming calm 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 35. East wind around 6 mph.
Thursday
A 20 percent chance of rain before noon. Partly sunny, with a high near 52. East wind 5 to 7 mph becoming north in the afternoon.
Thursday Night
Mostly clear, with a low around 34. Calm wind becoming south around 5 mph after midnight.
Friday
Sunny, with a high near 67.
Friday Night
Mostly clear, with a low around 40.
Saturday
Sunny, with a high near 67.
Saturday Night
A slight chance of rain and snow. Partly cloudy, with a low around 32. Chance of precipitation is 20%.
Sunday
A slight chance of rain before noon, then a chance of rain and snow. Partly sunny, with a high near 46. Chance of precipitation is 40%.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 32. Chance of precipitation is 40%.
Monday
A 30 percent chance of rain. Mostly cloudy, with a high near 49.
Monday Night
A 30 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 32.
Tuesday
A 50 percent chance of rain. Mostly cloudy, with a high near 52.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S St. Charles County Smartt Airport MO
 38.87°N 90.45°W (Elev. 436 ft)
Last Update:
9:46 pm CST Feb 24, 2026
Forecast Valid:
10pm CST Feb 24, 2026-6pm CST Mar 3, 2026
 
Forecast Discussion
 
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Additional Resources

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