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.

Overcast

68°F

20°C

Humidity 96%
Wind Speed Calm
Barometer 30.05 in (1017.2 mb)
Dewpoint 67°F (19°C)
Visibility 7.00 mi
Last update 15 Oct 1:54 am CDT
Extended Forecast for

Silex MO

  • Overnight

    Overnight: A slight chance of showers between 3am and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 65. Calm wind. Chance of precipitation is 30%.

    Low: 65 °F

    Chance
    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. Patchy fog between 8am and noon. High near 77. 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 90%.

    High: 77 °F

    Showers and
    Patchy Fog
    then Showers
    Likely

  • Thursday Night

    Thursday Night: Scattered showers and thunderstorms before 11pm, then isolated showers between 11pm and midnight. Cloudy, then gradually becoming partly cloudy, with a low around 46. Northwest wind 11 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 50%.

    Low: 46 °F

    Scattered
    Showers then
    Mostly Cloudy

  • Friday

    Friday: Increasing clouds, with a high near 55. Northwest wind 15 to 18 mph, with gusts as high as 31 mph.

    High: 55 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 37. North wind 5 to 15 mph, with gusts as high as 26 mph.

    Low: 37 °F

    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 37.

    Low: 37 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

Detailed Forecast

Overnight
A slight chance of showers between 3am and 4am, then a chance of showers and thunderstorms after 4am. 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. Patchy fog between 8am and noon. High near 77. 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 90%.
Thursday Night
Scattered showers and thunderstorms before 11pm, then isolated showers between 11pm and midnight. Cloudy, then gradually becoming partly cloudy, with a low around 46. Northwest wind 11 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 50%.
Friday
Increasing clouds, with a high near 55. Northwest wind 15 to 18 mph, with gusts as high as 31 mph.
Friday Night
Mostly cloudy, with a low around 37. North wind 5 to 15 mph, with gusts as high as 26 mph.
Saturday
Sunny, with a high near 60.
Saturday Night
Clear, with a low around 37.
Sunday
Sunny, with a high near 68.
Sunday Night
Mostly clear, with a low around 40.
Monday
Mostly sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 42.
Tuesday
Sunny, with a high near 74.
Tuesday Night
Mostly clear, with a low around 46.
Wednesday
Sunny, with a high near 78.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Silex MO
 39.13°N 91.04°W (Elev. 600 ft)
Last Update:
1:26 am CDT Oct 15, 2026
Forecast Valid:
2am CDT Oct 15, 2026-6pm CDT Oct 21, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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