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.

Fair

71°F

22°C

Humidity 79%
Wind Speed NE 7 mph
Barometer 30.00 in (1015.4 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 30 Jul 12:54 am CDT
Extended Forecast for

Silex MO

  • Overnight

    Overnight: Clear, with a low around 65. Light northeast wind.

    Low: 65 °F

    Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 87. Southeast wind 3 to 6 mph.

    High: 87 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: A 20 percent chance of showers after 5am. Increasing clouds, with a low around 68. East wind around 7 mph.

    Low: 68 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: Showers and thunderstorms before 1pm, then showers and possibly a thunderstorm between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. High near 84. South wind 9 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.

    High: 84 °F

    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before 4am, then showers likely. Low around 67. South wind 5 to 10 mph becoming light and variable. Winds could gust as high as 21 mph. Chance of precipitation is 90%.

    Low: 67 °F

    Showers

  • Saturday

    Saturday: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 79. Chance of precipitation is 60%.

    High: 79 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a low around 65. Light northeast wind.
Thursday
Increasing clouds, with a high near 87. Southeast wind 3 to 6 mph.
Thursday Night
A 20 percent chance of showers after 5am. Increasing clouds, with a low around 68. East wind around 7 mph.
Friday
Showers and thunderstorms before 1pm, then showers and possibly a thunderstorm between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. High near 84. South wind 9 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.
Friday Night
Showers and possibly a thunderstorm before 4am, then showers likely. Low around 67. South wind 5 to 10 mph becoming light and variable. Winds could gust as high as 21 mph. Chance of precipitation is 90%.
Saturday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 79. Chance of precipitation is 60%.
Saturday Night
Partly cloudy, with a low around 64.
Sunday
Sunny, with a high near 84.
Sunday Night
Mostly clear, with a low around 64.
Monday
Sunny, with a high near 85.
Monday Night
Mostly clear, with a low around 66.
Tuesday
A 20 percent chance of showers. Sunny, with a high near 88.
Tuesday Night
Mostly clear, with a low around 68.
Wednesday
Mostly sunny, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Silex MO
 39.13°N 91.06°W (Elev. 600 ft)
Last Update:
1:26 am CDT Jul 30, 2026
Forecast Valid:
1am CDT Jul 30, 2026-6pm CDT Aug 5, 2026
 
Forecast Discussion
 
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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