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.

Heavy Rain Fog/Mist

70°F

21°C

Humidity 93%
Wind Speed Calm
Barometer 29.98 in (1014.5 mb)
Dewpoint 68°F (20°C)
Visibility 2.50 mi
Last update 14 Oct 5:54 am CDT
Extended Forecast for

2 Miles NNW St. Charles County Smartt Airport MO

  • Today

    Today: Showers and possibly a thunderstorm, mainly before noon, then a chance of showers and thunderstorms after noon. High near 78. West wind around 7 mph becoming north in the afternoon. Chance of precipitation is 80%.

    High: 78 °F

    Showers then
    Chance
    Showers

  • Tonight

    Tonight: A slight chance of showers, then a chance of showers and thunderstorms after 10pm. Cloudy, with a low around 65. North wind around 7 mph becoming east after midnight. Chance of precipitation is 30%.

    Low: 65 °F

    Chance
    T-storms

  • Thursday

    Thursday: Showers and thunderstorms, mainly before 3pm, then showers likely and possibly a thunderstorm after 5pm. High near 82. East wind 7 to 10 mph becoming southwest in the afternoon. Chance of precipitation is 90%.

    High: 82 °F

    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 49. Northwest wind 8 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.

    Low: 49 °F

    Showers

  • Friday

    Friday: Mostly sunny, with a high near 61. Breezy, with a northwest wind 20 to 22 mph, with gusts as high as 32 mph.

    High: 61 °F

    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 40.

    Low: 40 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 71.

    High: 71 °F

    Sunny

Detailed Forecast

Today
Showers and possibly a thunderstorm, mainly before noon, then a chance of showers and thunderstorms after noon. High near 78. West wind around 7 mph becoming north in the afternoon. Chance of precipitation is 80%.
Tonight
A slight chance of showers, then a chance of showers and thunderstorms after 10pm. Cloudy, with a low around 65. North wind around 7 mph becoming east after midnight. Chance of precipitation is 30%.
Thursday
Showers and thunderstorms, mainly before 3pm, then showers likely and possibly a thunderstorm after 5pm. High near 82. East wind 7 to 10 mph becoming southwest in the afternoon. Chance of precipitation is 90%.
Thursday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 49. Northwest wind 8 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.
Friday
Mostly sunny, with a high near 61. Breezy, with a northwest wind 20 to 22 mph, with gusts as high as 32 mph.
Friday Night
Mostly clear, with a low around 39.
Saturday
Sunny, with a high near 64.
Saturday Night
Clear, with a low around 40.
Sunday
Sunny, with a high near 71.
Sunday Night
Partly cloudy, with a low around 46.
Monday
Mostly sunny, with a high near 74.
Monday Night
Partly cloudy, with a low around 50.
Tuesday
Mostly sunny, with a high near 79.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW St. Charles County Smartt Airport MO
 38.96°N 90.44°W (Elev. 413 ft)
Last Update:
5:06 am CDT Oct 14, 2026
Forecast Valid:
6am CDT Oct 14, 2026-6pm CDT Oct 20, 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