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

51°F

11°C

Humidity 83%
Wind Speed E 6 mph
Barometer 29.86 in (1011.1 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Wind Chill49°F (9°C)
Last update 9 Mar 8:54 am CDT
Extended Forecast for

3 Miles SSE St. Charles County Smartt Airport MO

  • Today

    Today: Sunny, with a high near 81. South wind 8 to 16 mph, with gusts as high as 25 mph.

    High: 81 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 59. Southwest wind 7 to 10 mph.

    Low: 59 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 40 percent chance of showers, mainly after 4pm. Mostly sunny, with a high near 83. South wind 6 to 15 mph, with gusts as high as 23 mph.

    High: 83 °F

    Mostly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7pm. Low around 53. South wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.

    Low: 53 °F

    Showers

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. Temperature rising to near 62 by 10am, then falling to around 49 during the remainder of the day. Breezy, with a southwest wind 14 to 23 mph becoming northwest in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 100%.

    High: 62 °F⇓

    Showers and
    Breezy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 55.

    High: 55 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 44.

    Low: 44 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 63.

    High: 63 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 81. South wind 8 to 16 mph, with gusts as high as 25 mph.
Tonight
Partly cloudy, with a low around 59. Southwest wind 7 to 10 mph.
Tuesday
A 40 percent chance of showers, mainly after 4pm. Mostly sunny, with a high near 83. South wind 6 to 15 mph, with gusts as high as 23 mph.
Tuesday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7pm. Low around 53. South wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.
Wednesday
Showers and possibly a thunderstorm. Temperature rising to near 62 by 10am, then falling to around 49 during the remainder of the day. Breezy, with a southwest wind 14 to 23 mph becoming northwest in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 100%.
Wednesday Night
Mostly cloudy, with a low around 32.
Thursday
Sunny, with a high near 55.
Thursday Night
Mostly cloudy, with a low around 44.
Friday
Partly sunny, with a high near 63.
Friday Night
Mostly cloudy, with a low around 38.
Saturday
Partly sunny, with a high near 66.
Saturday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 48.
Sunday
A 50 percent chance of rain and thunderstorms. Mostly cloudy, with a high near 69. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE St. Charles County Smartt Airport MO
 38.89°N 90.39°W (Elev. 427 ft)
Last Update:
8:26 am CDT Mar 9, 2026
Forecast Valid:
9am CDT Mar 9, 2026-6pm CDT Mar 15, 2026
 
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Additional Resources

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National Digital Forecast Database Weather Element Forecast

Chance of Precipitation