Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

65°F

18°C

Humidity 70%
Wind Speed S 16 mph
Barometer 29.84 in (1010.2 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 9 Mar 10:54 am CDT
Extended Forecast for

4 Miles E Portage Des Sioux MO

  • Today

    Today: Mostly sunny, with a high near 80. South wind 13 to 15 mph, with gusts as high as 25 mph.

    High: 80 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 60. South wind 6 to 10 mph.

    Low: 60 °F

    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm.  Mostly sunny, with a high near 83. South wind 6 to 14 mph, with gusts as high as 22 mph.  Chance of precipitation is 40%.

    High: 83 °F

    Mostly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7pm.  Low around 54. South wind 11 to 13 mph, with gusts as high as 22 mph.  Chance of precipitation is 90%.

    Low: 54 °F

    Showers
    Likely then
    T-storms

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm.  Temperature rising to near 62 by 10am, then falling to around 49 during the remainder of the day. Breezy, with a southwest wind 13 to 20 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph.  Chance of precipitation is 100%.

    High: 62 °F

    Showers and
    Breezy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 33.

    Low: 33 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 54.

    High: 54 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 44.

    Low: 44 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 63.

    High: 63 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 80. South wind 13 to 15 mph, with gusts as high as 25 mph.
Tonight
Mostly clear, with a low around 60. South wind 6 to 10 mph.
Tuesday
A slight chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 83. South wind 6 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Tuesday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7pm. Low around 54. South wind 11 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 90%.
Wednesday
Showers and possibly a thunderstorm. Temperature rising to near 62 by 10am, then falling to around 49 during the remainder of the day. Breezy, with a southwest wind 13 to 20 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%.
Wednesday Night
Mostly cloudy, with a low around 33.
Thursday
Sunny, with a high near 54.
Thursday Night
Mostly cloudy, with a low around 44.
Friday
Partly sunny, with a high near 63.
Friday Night
Mostly cloudy, with a low around 38.
Saturday
Partly sunny, with a high near 66.
Saturday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 48.
Sunday
A 50 percent chance of rain and thunderstorms. Mostly cloudy, with a high near 69. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E Portage Des Sioux MO
 38.93°N 90.27°W (Elev. 407 ft)
9:51 am CDT Mar 9, 2026
11am CDT Mar 9, 2026-6pm CDT Mar 15, 2026
 
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Additional Resources

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