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

32°F

0°C

Humidity 61%
Wind Speed Calm
Barometer 30.31 in (1026.7 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Last update 12 Jan 8:54 am CST
Extended Forecast for

5 Miles SE Silex MO

  • Today

    Today: Sunny, with a high near 51. Light southwest wind increasing to 5 to 9 mph in the morning. Winds could gust as high as 21 mph.

    High: 51 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 35. Southwest wind 6 to 8 mph.

    Low: 35 °F

    Mostly Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 57. Southwest wind 8 to 15 mph, with gusts as high as 25 mph.

    High: 57 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 36. West wind 7 to 10 mph, with gusts as high as 22 mph.

    Low: 36 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a temperature falling to around 31 by 5pm. Northwest wind 10 to 16 mph, with gusts as high as 33 mph.

    High: 40 °F⇓

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 16.

    Low: 16 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 30.

    High: 30 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

  • Friday

    Friday: A 20 percent chance of snow showers after noon. Partly sunny, with a high near 40.

    High: 40 °F

    Partly Sunny
    then Slight
    Chance Snow
    Showers

Detailed Forecast

Today
Sunny, with a high near 51. Light southwest wind increasing to 5 to 9 mph in the morning. Winds could gust as high as 21 mph.
Tonight
Mostly clear, with a low around 35. Southwest wind 6 to 8 mph.
Tuesday
Increasing clouds, with a high near 57. Southwest wind 8 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 36. West wind 7 to 10 mph, with gusts as high as 22 mph.
Wednesday
Mostly cloudy, with a temperature falling to around 31 by 5pm. Northwest wind 10 to 16 mph, with gusts as high as 33 mph.
Wednesday Night
Mostly clear, with a low around 16.
Thursday
Mostly sunny, with a high near 30.
Thursday Night
Mostly cloudy, with a low around 27.
Friday
A 20 percent chance of snow showers after noon. Partly sunny, with a high near 40.
Friday Night
Mostly cloudy, with a low around 17.
Saturday
Partly sunny, with a high near 27.
Saturday Night
Partly cloudy, with a low around 9.
Sunday
Mostly sunny, with a high near 27.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SE Silex MO
 39.08°N 90.98°W (Elev. 673 ft)
Last Update:
9:36 am CST Jan 12, 2026
Forecast Valid:
9am CST Jan 12, 2026-6pm CST Jan 18, 2026
 
Forecast Discussion
 
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Additional Resources

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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