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.

Fair

76°F

24°C

Humidity 42%
Wind Speed S 6 mph
Barometer 29.87 in (1011.0 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 16 Apr 7:54 pm CDT
Extended Forecast for

4 Miles S St. Charles County Smartt Airport MO

  • Tonight

    Tonight: Mostly clear, with a low around 60. South wind 3 to 5 mph.

    Low: 60 °F

    Mostly Clear

  • Friday

    Friday: Isolated showers and thunderstorms after 3pm. Mostly sunny, with a high near 86. South wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 20%.

    High: 86 °F

    Mostly Sunny
    then Isolated
    T-storms

  • Friday Night

    Friday Night: Showers and thunderstorms before 1am, then showers and possibly a thunderstorm, mainly after 1am. Low around 47. South wind around 14 mph becoming west after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 100%.

    Low: 47 °F

    T-storms

  • Saturday

    Saturday: Showers likely, mainly before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 60. Northwest wind 15 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.

    High: 60 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 39. Northwest wind 6 to 14 mph, with gusts as high as 22 mph.

    Low: 39 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 60. South wind 3 to 5 mph.
Friday
Isolated showers and thunderstorms after 3pm. Mostly sunny, with a high near 86. South wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 20%.
Friday Night
Showers and thunderstorms before 1am, then showers and possibly a thunderstorm, mainly after 1am. Low around 47. South wind around 14 mph becoming west after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 100%.
Saturday
Showers likely, mainly before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 60. Northwest wind 15 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.
Saturday Night
Mostly clear, with a low around 39. Northwest wind 6 to 14 mph, with gusts as high as 22 mph.
Sunday
Sunny, with a high near 66.
Sunday Night
Mostly clear, with a low around 43.
Monday
Sunny, with a high near 74.
Monday Night
Mostly clear, with a low around 53.
Tuesday
Mostly sunny, with a high near 79.
Tuesday Night
Partly cloudy, with a low around 57.
Wednesday
Sunny, with a high near 80.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 58.
Thursday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 80.
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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:
7:06 pm CDT Apr 16, 2026
Forecast Valid:
8pm CDT Apr 16, 2026-6pm CDT Apr 23, 2026
 
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Additional Resources

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