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.

Overcast

26°F

-3°C

Humidity 57%
Wind Speed S 12 mph
Barometer 30.18 in (1022.6 mb)
Dewpoint 13°F (-11°C)
Visibility 10.00 mi
Wind Chill15°F (-9°C)
Last update 1 Feb 3:54 pm CST
Extended Forecast for

4 Miles S Portage Des Sioux MO

  • This Afternoon

    This Afternoon: A 30 percent chance of snow. Cloudy, with a high near 29. South wind around 9 mph.

    High: 29 °F

    Chance Snow

  • Tonight

    Tonight: A slight chance of snow before 9pm, then a chance of flurries between 9pm and 11pm. Mostly cloudy, with a low around 17. South wind 5 to 7 mph becoming light and variable. Chance of precipitation is 20%.

    Low: 17 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 37. West wind 5 to 7 mph becoming calm in the afternoon.

    High: 37 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 25. Calm wind becoming east around 5 mph after midnight.

    Low: 25 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of snow. Mostly cloudy, with a high near 33. East wind 5 to 9 mph becoming north in the afternoon.

    High: 33 °F

    Slight Chance
    Snow

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 18.

    Low: 18 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 15.

    Low: 15 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 30 percent chance of snow. Cloudy, with a high near 29. South wind around 9 mph.
Tonight
A slight chance of snow before 9pm, then a chance of flurries between 9pm and 11pm. Mostly cloudy, with a low around 17. South wind 5 to 7 mph becoming light and variable. Chance of precipitation is 20%.
Monday
Partly sunny, with a high near 37. West wind 5 to 7 mph becoming calm in the afternoon.
Monday Night
Mostly cloudy, with a low around 25. Calm wind becoming east around 5 mph after midnight.
Tuesday
A 20 percent chance of snow. Mostly cloudy, with a high near 33. East wind 5 to 9 mph becoming north in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 18.
Wednesday
Mostly sunny, with a high near 31.
Wednesday Night
Partly cloudy, with a low around 15.
Thursday
Mostly sunny, with a high near 41.
Thursday Night
Mostly clear, with a low around 33.
Friday
Mostly sunny, with a high near 46.
Friday Night
Partly cloudy, with a low around 21.
Saturday
Sunny, with a high near 37.
Saturday Night
Partly cloudy, with a low around 25.
Sunday
Mostly sunny, with a high near 42.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Portage Des Sioux MO
 38.87°N 90.33°W (Elev. 456 ft)
Last Update:
3:16 pm CST Feb 1, 2026
Forecast Valid:
4pm CST Feb 1, 2026-6pm CST Feb 8, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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