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.

Mostly Cloudy

71°F

22°C

Humidity 87%
Wind Speed Calm
Barometer 30.04 in (1017.0 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 14 Oct 10:54 pm CDT
Extended Forecast for

Silex MO

  • Tonight

    Tonight: Scattered showers, with thunderstorms also possible after 5am. Mostly cloudy, with a low around 65. Calm wind. Chance of precipitation is 30%.

    Low: 65 °F

    Scattered
    Showers

  • Thursday

    Thursday: Showers and thunderstorms before 1pm, then a chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. High near 78. Light and variable wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 80%.

    High: 78 °F

    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and midnight. Cloudy, then gradually becoming partly cloudy, with a low around 46. Northwest wind 11 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 50%.

    Low: 46 °F

    Chance
    Showers then
    Mostly Cloudy

  • Friday

    Friday: Increasing clouds, with a high near 55. Northwest wind 14 to 18 mph, with gusts as high as 31 mph.

    High: 55 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: Partly cloudy, with a low around 38. Northwest wind 9 to 14 mph becoming light north after midnight. Winds could gust as high as 25 mph.

    Low: 38 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 38.

    Low: 38 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

Detailed Forecast

Tonight
Scattered showers, with thunderstorms also possible after 5am. Mostly cloudy, with a low around 65. Calm wind. Chance of precipitation is 30%.
Thursday
Showers and thunderstorms before 1pm, then a chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. High near 78. Light and variable wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 80%.
Thursday Night
A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and midnight. Cloudy, then gradually becoming partly cloudy, with a low around 46. Northwest wind 11 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 50%.
Friday
Increasing clouds, with a high near 55. Northwest wind 14 to 18 mph, with gusts as high as 31 mph.
Friday Night
Partly cloudy, with a low around 38. Northwest wind 9 to 14 mph becoming light north after midnight. Winds could gust as high as 25 mph.
Saturday
Sunny, with a high near 61.
Saturday Night
Clear, with a low around 38.
Sunday
Sunny, with a high near 68.
Sunday Night
Mostly clear, with a low around 41.
Monday
Mostly sunny, with a high near 74.
Monday Night
Partly cloudy, with a low around 45.
Tuesday
Sunny, with a high near 77.
Tuesday Night
Mostly clear, with a low around 51.
Wednesday
A 20 percent chance of showers. Sunny, with a high near 80.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Silex MO
 39.13°N 91.06°W (Elev. 600 ft)
Last Update:
10:21 pm CDT Oct 14, 2026
Forecast Valid:
11pm CDT Oct 14, 2026-6pm CDT Oct 21, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation