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

67°F

19°C

Humidity 79%
Wind Speed NW 13 G 24 mph
Barometer 29.82 in (1009.4 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 21 Jun 11:54 pm CDT
Extended Forecast for

Silex MO

  • Overnight

    Overnight: Mostly cloudy, with a low around 61. North wind around 8 mph, with gusts as high as 20 mph.

    Low: 61 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 75. North wind 5 to 8 mph.

    High: 75 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 57. Light north wind.

    Low: 57 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 80. Light east wind.

    High: 80 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 62. Calm wind. Chance of precipitation is 30%.

    Low: 62 °F

    Partly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 81. Chance of precipitation is 60%.

    High: 81 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am, then a slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64. Chance of precipitation is 20%.

    Low: 64 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 62.

    Low: 62 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Mostly cloudy, with a low around 61. North wind around 8 mph, with gusts as high as 20 mph.
Monday
Mostly cloudy, with a high near 75. North wind 5 to 8 mph.
Monday Night
Partly cloudy, with a low around 57. Light north wind.
Tuesday
Sunny, with a high near 80. Light east wind.
Tuesday Night
A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 62. Calm wind. Chance of precipitation is 30%.
Wednesday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 81. Chance of precipitation is 60%.
Wednesday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am, then a slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64. Chance of precipitation is 20%.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 81.
Thursday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 62.
Friday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 81.
Friday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Saturday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
Saturday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Sunday
Sunny, with a high near 91.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Silex MO
 39.13°N 91.04°W (Elev. 600 ft)
Last Update:
11:26 pm CDT Jun 21, 2026
Forecast Valid:
12am CDT Jun 22, 2026-6pm CDT Jun 28, 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