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

52°F

11°C

Humidity 86%
Wind Speed Calm
Barometer 30.00 in (1015.7 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 29 Sep 4:54 am CDT
Extended Forecast for

Silex MO

  • Today

    Today: Sunny, with a high near 84. South wind 3 to 8 mph.

    High: 84 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 66. Southeast wind 3 to 6 mph.

    Low: 66 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Cloudy, then gradually becoming mostly sunny, with a high near 88. South wind 5 to 7 mph.

    High: 88 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 70. South wind 5 to 7 mph.

    Low: 70 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 50 percent chance of showers. Cloudy, with a high near 84. South wind 5 to 7 mph.

    High: 84 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Low around 63. Chance of precipitation is 80%.

    Low: 63 °F

    Showers

  • Friday

    Friday: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 71. Chance of precipitation is 70%.

    High: 71 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 55.

    Low: 55 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A 20 percent chance of showers. Partly sunny, with a high near 69.

    High: 69 °F

    Slight Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 84. South wind 3 to 8 mph.
Tonight
Mostly cloudy, with a low around 66. Southeast wind 3 to 6 mph.
Wednesday
Cloudy, then gradually becoming mostly sunny, with a high near 88. South wind 5 to 7 mph.
Wednesday Night
Mostly cloudy, with a low around 70. South wind 5 to 7 mph.
Thursday
A 50 percent chance of showers. Cloudy, with a high near 84. South wind 5 to 7 mph.
Thursday Night
Showers and possibly a thunderstorm. Low around 63. Chance of precipitation is 80%.
Friday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 71. Chance of precipitation is 70%.
Friday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 55.
Saturday
A 20 percent chance of showers. Partly sunny, with a high near 69.
Saturday Night
Mostly cloudy, with a low around 56.
Sunday
Mostly sunny, with a high near 70.
Sunday Night
Mostly clear, with a low around 51.
Monday
Sunny, with a high near 69.
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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 Sep 29, 2026
Forecast Valid:
5am CDT Sep 29, 2026-6pm CDT Oct 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