National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair and Breezy

15°F

-9°C

Humidity 53%
Wind Speed NW 22 G 29 mph
Barometer 30.29 in (1026.1 mb)
Dewpoint 1°F (-17°C)
Visibility 10.00 mi
Wind Chill-3°F (-19°C)
Last update 19 Jan 5:54 am CST
Extended Forecast for

4 Miles E Portage Des Sioux MO

Cold Weather Advisory January 19, 06:51am until January 19, 10:00am
Click here for hazard details and duration
...
  •  
    Cold Weather Advisory January 19, 06:51am until January 19, 10:00am

    NOW until 10:00am Mon

    Cold Weather Advisory

  • M.L.King Day

    High: 20 °F

    Sunny and
    Blustery then
    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 13. West wind 5 to 7 mph becoming light and variable.

    Low: 13 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 38. Light southeast wind becoming southwest 5 to 9 mph in the morning.

    High: 38 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 28. South wind 8 to 13 mph becoming southwest after midnight. Winds could gust as high as 21 mph.

    Low: 28 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Sunny, with a high near 45. West wind 7 to 13 mph, with gusts as high as 20 mph.

    High: 45 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 22.

    Low: 22 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 36.

    High: 36 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 17.

    Low: 17 °F

    Mostly Cloudy

Detailed Forecast

M.L.King Day
Sunny and cold, with a high near 20. Blustery, with a northwest wind 16 to 21 mph decreasing to 9 to 14 mph in the afternoon. Winds could gust as high as 28 mph.
Tonight
Mostly clear, with a low around 13. West wind 5 to 7 mph becoming light and variable.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 38. Light southeast wind becoming southwest 5 to 9 mph in the morning.
Tuesday Night
Increasing clouds, with a low around 28. South wind 8 to 13 mph becoming southwest after midnight. Winds could gust as high as 21 mph.
Wednesday
Sunny, with a high near 45. West wind 7 to 13 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 22.
Thursday
Sunny, with a high near 36.
Thursday Night
Mostly cloudy, with a low around 17.
Friday
Mostly cloudy, with a high near 25.
Friday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 0.
Saturday
A 20 percent chance of snow. Partly sunny and cold, with a high near 15.
Saturday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 6.
Sunday
Mostly sunny, with a high near 25.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E Portage Des Sioux MO
 38.93°N 90.27°W (Elev. 407 ft)
Last Update:
5:16 am CST Jan 19, 2026
Forecast Valid:
6am CST Jan 19, 2026-6pm CST Jan 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation