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.

Mostly Cloudy

8°F

-13°C

Humidity 76%
Wind Speed E 3 mph
Barometer 30.56 in (1035.6 mb)
Dewpoint 2°F (-17°C)
Visibility 10.00 mi
Last update 15 Jan 6:54 am CST
Extended Forecast for

4 Miles E Portage Des Sioux MO

  • Today

    Today: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 27. Calm wind becoming south around 6 mph in the afternoon.

    High: 27 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Partly cloudy, with a temperature rising to around 29 by 4am. South wind 5 to 10 mph becoming west after midnight. Winds could gust as high as 22 mph.

    Low: 19 °F⇑

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 38. West wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 38 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 24. West wind around 6 mph becoming calm.

    Low: 24 °F

    Patchy Fog

  • Friday

    Friday: Patchy fog before 7am. Otherwise, mostly sunny, with a high near 45. South wind 6 to 11 mph, with gusts as high as 20 mph.

    High: 45 °F

    Patchy Fog
    then Partly
    Sunny

  • Friday Night

    Friday Night: Rain likely before 3am, then a chance of rain and snow. Cloudy, with a low around 30. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 30 °F

    Rain Likely
    then Chance
    Rain/Snow

  • Saturday

    Saturday: Partly sunny, with a high near 34.

    High: 34 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 14.

    Low: 14 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny and cold, with a high near 19.

    High: 19 °F

    Cold

Detailed Forecast

Today
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 27. Calm wind becoming south around 6 mph in the afternoon.
Tonight
Partly cloudy, with a temperature rising to around 29 by 4am. South wind 5 to 10 mph becoming west after midnight. Winds could gust as high as 22 mph.
Thursday
Mostly sunny, with a high near 38. West wind 7 to 11 mph, with gusts as high as 20 mph.
Thursday Night
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 24. West wind around 6 mph becoming calm.
Friday
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 45. South wind 6 to 11 mph, with gusts as high as 20 mph.
Friday Night
Rain likely before 3am, then a chance of rain and snow. Cloudy, with a low around 30. Chance of precipitation is 70%. Little or no snow accumulation expected.
Saturday
Partly sunny, with a high near 34.
Saturday Night
Mostly cloudy, with a low around 14.
Sunday
Mostly sunny and cold, with a high near 19.
Sunday Night
Mostly clear, with a low around 4.
M.L.King Day
Sunny and cold, with a high near 16.
Monday Night
Partly cloudy, with a low around 2.
Tuesday
Sunny and cold, with a high near 18.
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Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E Portage Des Sioux MO
 38.93°N 90.27°W (Elev. 407 ft)
Last Update:
5:22 am CST Jan 15, 2025
Forecast Valid:
7am CST Jan 15, 2025-6pm CST Jan 21, 2025
 
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