Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

36°F

2°C

Humidity 48%
Wind Speed W 12 mph
Barometer 30.51 in (1033.4 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill28°F (-2°C)
Last update 11 Jan 1:54 pm CST
Extended Forecast for

4 Miles E Portage Des Sioux MO

  • This Afternoon

    This Afternoon: Sunny, with a high near 39. West wind 7 to 10 mph.

    High: 39 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 26. South wind 5 to 7 mph.

    Low: 26 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 51. Southwest wind 6 to 10 mph.

    High: 51 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 36. Southwest wind 5 to 7 mph.

    Low: 36 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 59. West wind 8 to 14 mph, with gusts as high as 23 mph.

    High: 59 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain after midnight.  Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 43.

    High: 43 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 19.

    Low: 19 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 38.

    High: 38 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 39. West wind 7 to 10 mph.
Tonight
Clear, with a low around 26. South wind 5 to 7 mph.
Monday
Sunny, with a high near 51. Southwest wind 6 to 10 mph.
Monday Night
Partly cloudy, with a low around 36. Southwest wind 5 to 7 mph.
Tuesday
Partly sunny, with a high near 59. West wind 8 to 14 mph, with gusts as high as 23 mph.
Tuesday Night
A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 37.
Wednesday
Mostly cloudy, with a high near 43.
Wednesday Night
Partly cloudy, with a low around 19.
Thursday
Mostly sunny, with a high near 38.
Thursday Night
Mostly cloudy, with a low around 28.
Friday
Mostly cloudy, with a high near 42.
Friday Night
Mostly cloudy, with a low around 23.
Saturday
Mostly cloudy, with a high near 32.
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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)
11:06 am CST Jan 11, 2026
1pm CST Jan 11, 2026-6pm CST Jan 17, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database