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.

Mostly Cloudy and Breezy

74°F

23°C

Humidity 67%
Wind Speed S 22 G 36 mph
Barometer 29.72 in (1006.2 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 2 Apr 2:54 pm CDT
Extended Forecast for

St. Charles County Smartt Airport MO

Wind Advisory April 2, 03:27pm until April 2, 07:00pm
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory April 2, 03:27pm until April 2, 07:00pm

    NOW until 7:00pm Thu

    Wind Advisory

  • This Afternoon

    High: 74 °F

    Chance
    T-storms and
    Breezy

  • Tonight

    Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. South wind 13 to 18 mph becoming light and variable after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 50%.

    Low: 60 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 83. Light and variable wind becoming south 9 to 14 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 50%.

    High: 83 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7pm. Low around 52. South wind around 11 mph. Chance of precipitation is 100%.

    Low: 52 °F

    Showers

  • Saturday

    Saturday: Showers likely before 1pm. Mostly cloudy, with a high near 65. West wind 11 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.

    High: 65 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 38.

    Low: 38 °F

    Clear

Detailed Forecast

This Afternoon
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 74. Breezy, with a south wind around 23 mph, with gusts as high as 37 mph.
Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. South wind 13 to 18 mph becoming light and variable after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 50%.
Friday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 83. Light and variable wind becoming south 9 to 14 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 50%.
Friday Night
A slight chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7pm. Low around 52. South wind around 11 mph. Chance of precipitation is 100%.
Saturday
Showers likely before 1pm. Mostly cloudy, with a high near 65. West wind 11 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.
Saturday Night
Partly cloudy, with a low around 38.
Sunday
Sunny, with a high near 59.
Sunday Night
Clear, with a low around 38.
Monday
Sunny, with a high near 62.
Monday Night
A slight chance of rain and snow showers after 1am. Partly cloudy, with a low around 34. Chance of precipitation is 20%.
Tuesday
Mostly sunny, with a high near 56.
Tuesday Night
Partly cloudy, with a low around 38.
Wednesday
Mostly sunny, with a high near 71.
Wednesday Night
Partly cloudy, with a low around 50.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 77.
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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:
3:16 pm CDT Apr 2, 2026
Forecast Valid:
3pm CDT Apr 2, 2026-6pm CDT Apr 9, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation