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.

Partly Cloudy

31°F

-1°C

Humidity 56%
Wind Speed S 7 mph
Barometer 30.18 in (1022.3 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 11 Nov 4:54 am CST
Extended Forecast for

Portage Des Sioux MO

  • Veterans Day

    Veterans Day: Cloudy, then gradually becoming mostly sunny, with a high near 56. Southwest wind 8 to 16 mph, with gusts as high as 30 mph.

    High: 56 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Clear, with a low around 36. West wind 5 to 9 mph.

    Low: 36 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 63. West wind 6 to 11 mph.

    High: 63 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 36. West wind around 5 mph becoming calm in the evening.

    Low: 36 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, with a high near 64. Calm wind becoming south 5 to 9 mph in the morning.

    High: 64 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 48.

    Low: 48 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

Detailed Forecast

Veterans Day
Cloudy, then gradually becoming mostly sunny, with a high near 56. Southwest wind 8 to 16 mph, with gusts as high as 30 mph.
Tonight
Clear, with a low around 36. West wind 5 to 9 mph.
Wednesday
Sunny, with a high near 63. West wind 6 to 11 mph.
Wednesday Night
Mostly clear, with a low around 36. West wind around 5 mph becoming calm in the evening.
Thursday
Partly sunny, with a high near 64. Calm wind becoming south 5 to 9 mph in the morning.
Thursday Night
Partly cloudy, with a low around 48.
Friday
Mostly sunny, with a high near 74.
Friday Night
Partly cloudy, with a low around 56.
Saturday
Mostly sunny, with a high near 78.
Saturday Night
A 30 percent chance of rain, mainly after midnight. Partly cloudy, with a low around 55.
Sunday
A 40 percent chance of rain. Mostly sunny, with a high near 69.
Sunday Night
A 30 percent chance of rain. Partly cloudy, with a low around 45.
Monday
A 40 percent chance of rain. Partly sunny, with a high near 59.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Portage Des Sioux MO
 38.93°N 90.33°W (Elev. 407 ft)
Last Update:
4:41 am CST Nov 11, 2025
Forecast Valid:
5am CST Nov 11, 2025-6pm CST Nov 17, 2025
 
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