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

58°F

14°C

Humidity 87%
Wind Speed E 7 mph
Barometer 29.98 in (1014.8 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 17 Oct 5:54 am CDT
Extended Forecast for

4 Miles WNW St. Charles County Smartt Airport MO

  • Today

    Today: Mostly sunny, with a high near 84. Light and variable wind becoming south 6 to 11 mph in the morning.

    High: 84 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 65. South wind around 8 mph.

    Low: 65 °F

    Partly Cloudy

  • Saturday

    Saturday: A slight chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7am. High near 79. Southwest wind 6 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 90%.

    High: 79 °F

    Showers then
    T-storms

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 50. Southwest wind 8 to 15 mph becoming northwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 80%.

    Low: 50 °F

    T-storms then
    Showers

  • Sunday

    Sunday: Sunny, with a high near 65. Northwest wind 14 to 16 mph, with gusts as high as 28 mph.

    High: 65 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 46.

    Low: 46 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 50.

    Low: 50 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 84. Light and variable wind becoming south 6 to 11 mph in the morning.
Tonight
Partly cloudy, with a low around 65. South wind around 8 mph.
Saturday
A slight chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7am. High near 79. Southwest wind 6 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 90%.
Saturday Night
Showers and possibly a thunderstorm. Low around 50. Southwest wind 8 to 15 mph becoming northwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 80%.
Sunday
Sunny, with a high near 65. Northwest wind 14 to 16 mph, with gusts as high as 28 mph.
Sunday Night
Clear, with a low around 46.
Monday
Sunny, with a high near 74.
Monday Night
Mostly clear, with a low around 50.
Tuesday
Sunny, with a high near 66.
Tuesday Night
Mostly clear, with a low around 43.
Wednesday
Sunny, with a high near 69.
Wednesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 49.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 68.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WNW St. Charles County Smartt Airport MO
 38.96°N 90.5°W (Elev. 417 ft)
Last Update:
6:21 am CDT Oct 17, 2025
Forecast Valid:
6am CDT Oct 17, 2025-6pm CDT Oct 23, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation