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

61°F

16°C

Humidity 36%
Wind Speed Vrbl 7 mph
Barometer 30.27 in (1024.9 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 20 Apr 1:54 pm CDT
Extended Forecast for

4 Miles SE Silex MO

  • This Afternoon

    This Afternoon: Sunny, with a high near 69. South wind around 7 mph.

    High: 69 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 53. Southeast wind around 6 mph.

    Low: 53 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 78. Southwest wind 7 to 13 mph, with gusts as high as 26 mph.

    High: 78 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 56. Southwest wind 6 to 9 mph, with gusts as high as 20 mph.

    Low: 56 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 77. Southwest wind 5 to 7 mph.

    High: 77 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 60. Chance of precipitation is 80%.

    Low: 60 °F

    Chance
    T-storms then
    Showers

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 74. Chance of precipitation is 80%.

    High: 74 °F

    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 69. South wind around 7 mph.
Tonight
Mostly clear, with a low around 53. Southeast wind around 6 mph.
Tuesday
Sunny, with a high near 78. Southwest wind 7 to 13 mph, with gusts as high as 26 mph.
Tuesday Night
Mostly clear, with a low around 56. Southwest wind 6 to 9 mph, with gusts as high as 20 mph.
Wednesday
Mostly sunny, with a high near 77. Southwest wind 5 to 7 mph.
Wednesday Night
Mostly clear, with a low around 58.
Thursday
Mostly sunny, with a high near 82.
Thursday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 60. Chance of precipitation is 80%.
Friday
Showers and possibly a thunderstorm. High near 74. Chance of precipitation is 80%.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 49. Chance of precipitation is 40%.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 71.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 50.
Sunday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 69.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SE Silex MO
 39.08°N 91.01°W (Elev. 482 ft)
Last Update:
1:26 pm CDT Apr 20, 2026
Forecast Valid:
2pm CDT Apr 20, 2026-6pm CDT Apr 26, 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