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

85°F

29°C

Humidity 51%
Wind Speed E 8 mph
Barometer 30.03 in (1016.4 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 30 Jul 1:54 pm CDT
Extended Forecast for

Silex MO

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 87. Light east wind.

    High: 87 °F

    Partly Sunny

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 68. Calm wind becoming southeast around 5 mph after midnight.

    Low: 68 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Friday

    Friday: Showers and thunderstorms, mainly before 3pm, then showers likely and possibly a thunderstorm after 5pm. High near 83. South wind 5 to 9 mph, with gusts as high as 22 mph. Chance of precipitation is 90%.

    High: 83 °F

    Showers then
    Showers
    Likely

  • Friday Night

    Friday Night: Showers and thunderstorms, mainly before 11pm. Low around 67. South wind 6 to 8 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 80%.

    Low: 67 °F

    Showers then
    Mostly Cloudy

  • Saturday

    Saturday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 77. West wind 8 to 11 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.

    High: 77 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 64.

    Low: 64 °F

    Chance
    Showers

  • Sunday

    Sunday: A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

  • Monday

    Monday: A 20 percent chance of showers after 1pm. Sunny, with a high near 84.

    High: 84 °F

    Sunny then
    Slight Chance
    Showers

Detailed Forecast

This Afternoon
Partly sunny, with a high near 87. Light east wind.
Tonight
A 20 percent chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 68. Calm wind becoming southeast around 5 mph after midnight.
Friday
Showers and thunderstorms, mainly before 3pm, then showers likely and possibly a thunderstorm after 5pm. High near 83. South wind 5 to 9 mph, with gusts as high as 22 mph. Chance of precipitation is 90%.
Friday Night
Showers and thunderstorms, mainly before 11pm. Low around 67. South wind 6 to 8 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 80%.
Saturday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 77. West wind 8 to 11 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.
Saturday Night
A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 64.
Sunday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 81.
Sunday Night
Mostly clear, with a low around 62.
Monday
A 20 percent chance of showers after 1pm. Sunny, with a high near 84.
Monday Night
Mostly clear, with a low around 64.
Tuesday
A 20 percent chance of showers. Sunny, with a high near 87.
Tuesday Night
Mostly clear, with a low around 67.
Wednesday
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:
1:31 pm CDT Jul 30, 2026
Forecast Valid:
2pm CDT Jul 30, 2026-6pm CDT Aug 5, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation