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.

Light Rain

60°F

16°C

Humidity 80%
Wind Speed N 6 mph
Barometer 29.80 in (1008.9 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 8 May 6:54 pm CDT
Extended Forecast for

St. Charles County Smartt Airport MO

  • Tonight

    Tonight: Showers and thunderstorms likely before 10pm, then a slight chance of showers between 10pm and 11pm. Cloudy, then gradually becoming partly cloudy, with a low around 53. West wind 5 to 9 mph becoming light and variable. Chance of precipitation is 70%.

    Low: 53 °F

    Showers
    Likely then
    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, then gradually becoming sunny, with a high near 81. West wind 6 to 14 mph.

    High: 81 °F

    Becoming
    Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers between 1am and 2am. Increasing clouds, with a low around 54. West wind 5 to 9 mph becoming north after midnight. Chance of precipitation is 20%.

    Low: 54 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: Partly sunny, with a high near 67. North wind around 11 mph.

    High: 67 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 43. North wind 5 to 8 mph becoming calm after midnight.

    Low: 43 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

  • Monday Night

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

    Low: 50 °F

    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of showers, with thunderstorms also possible after 1pm. Sunny, with a high near 80. Chance of precipitation is 20%.

    High: 80 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

Detailed Forecast

Tonight
Showers and thunderstorms likely before 10pm, then a slight chance of showers between 10pm and 11pm. Cloudy, then gradually becoming partly cloudy, with a low around 53. West wind 5 to 9 mph becoming light and variable. Chance of precipitation is 70%.
Saturday
Partly sunny, then gradually becoming sunny, with a high near 81. West wind 6 to 14 mph.
Saturday Night
A slight chance of showers between 1am and 2am. Increasing clouds, with a low around 54. West wind 5 to 9 mph becoming north after midnight. Chance of precipitation is 20%.
Sunday
Partly sunny, with a high near 67. North wind around 11 mph.
Sunday Night
Mostly clear, with a low around 43. North wind 5 to 8 mph becoming calm after midnight.
Monday
Sunny, with a high near 72.
Monday Night
Mostly clear, with a low around 50.
Tuesday
A slight chance of showers, with thunderstorms also possible after 1pm. Sunny, with a high near 80. Chance of precipitation is 20%.
Tuesday Night
Mostly clear, with a low around 56.
Wednesday
Sunny, with a high near 76.
Wednesday Night
Mostly clear, with a low around 51.
Thursday
Sunny, with a high near 79.
Thursday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 59.
Friday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
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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:
5:50 pm CDT May 8, 2026
Forecast Valid:
6pm CDT May 8, 2026-6pm CDT May 15, 2026
 
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