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

28°F

-2°C

Humidity 69%
Wind Speed N 6 mph
Barometer 30.12 in (1020.3 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 21 Feb 2:54 am CST
Extended Forecast for

4 Miles NW Silex MO

  • Overnight

    Overnight: Mostly cloudy, with a low around 24. North wind around 6 mph.

    Low: 24 °F

    Mostly Cloudy

  • Saturday

    Saturday: A chance of flurries before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 39. Northwest wind 7 to 13 mph.

    High: 39 °F

    Chance
    Flurries

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 18. Northwest wind 9 to 15 mph, with gusts as high as 25 mph.

    Low: 18 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 31. Northwest wind 11 to 15 mph, with gusts as high as 31 mph.

    High: 31 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 12. Northwest wind around 11 mph, with gusts as high as 26 mph.

    Low: 12 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 32.

    High: 32 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 17.

    Low: 17 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 52.

    High: 52 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 24. North wind around 6 mph.
Saturday
A chance of flurries before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 39. Northwest wind 7 to 13 mph.
Saturday Night
Mostly clear, with a low around 18. Northwest wind 9 to 15 mph, with gusts as high as 25 mph.
Sunday
Sunny, with a high near 31. Northwest wind 11 to 15 mph, with gusts as high as 31 mph.
Sunday Night
Mostly clear, with a low around 12. Northwest wind around 11 mph, with gusts as high as 26 mph.
Monday
Sunny, with a high near 32.
Monday Night
Mostly clear, with a low around 17.
Tuesday
Partly sunny, with a high near 52.
Tuesday Night
Mostly cloudy, with a low around 38.
Wednesday
Partly sunny, with a high near 60.
Wednesday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 33.
Thursday
A slight chance of rain and snow. Mostly sunny, with a high near 51. Chance of precipitation is 20%.
Thursday Night
Mostly clear, with a low around 31.
Friday
Sunny, with a high near 62.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NW Silex MO
 39.17°N 91.09°W (Elev. 653 ft)
Last Update:
2:56 am CST Feb 21, 2026
Forecast Valid:
3am CST Feb 21, 2026-6pm CST Feb 27, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation