Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Mostly Cloudy and Windy

72°F

22°C

Humidity 68%
Wind Speed S 30 G 38 mph
Barometer 29.74 in (1006.7 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 2 Apr 11:54 am CDT
Extended Forecast for

4 Miles E Portage Des Sioux MO

Wind Advisory until April 2, 07:00pm
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory until April 2, 07:00pm

    NOW until 7:00pm Thu

    Wind Advisory

  • This Afternoon

    High: 74 °F

    Showers and
    Breezy

  • Tonight

    Tonight: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 62. South wind 12 to 17 mph becoming light and variable  after midnight. Winds could gust as high as 28 mph.  Chance of precipitation is 50%.

    Low: 62 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms, mainly after 11am.  Partly sunny, with a high near 82. Light and variable wind becoming south 9 to 14 mph in the morning. Winds could gust as high as 22 mph.

    High: 82 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7pm.  Low around 55. South wind around 11 mph, with gusts as high as 20 mph.  Chance of precipitation is 100%.

    Low: 55 °F

    Showers

  • Saturday

    Saturday: A 50 percent chance of showers, mainly before 1pm.  Mostly cloudy, with a steady temperature around 58. West wind 10 to 16 mph, with gusts as high as 24 mph.

    High: 58 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 39.

    Low: 39 °F

    Clear

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. High near 74. Breezy, with a south wind 22 to 24 mph, with gusts as high as 38 mph. Chance of precipitation is 80%.
Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. South wind 12 to 17 mph becoming light and variable after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 50%.
Friday
A 50 percent chance of showers and thunderstorms, mainly after 11am. Partly sunny, with a high near 82. Light and variable wind becoming south 9 to 14 mph in the morning. Winds could gust as high as 22 mph.
Friday Night
A slight chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7pm. Low around 55. South wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 100%.
Saturday
A 50 percent chance of showers, mainly before 1pm. Mostly cloudy, with a steady temperature around 58. West wind 10 to 16 mph, with gusts as high as 24 mph.
Saturday Night
Partly cloudy, with a low around 39.
Sunday
Sunny, with a high near 59.
Sunday Night
Clear, with a low around 39.
Monday
Sunny, with a high near 64.
Monday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 39.
Tuesday
Mostly sunny, with a high near 60.
Tuesday Night
Partly cloudy, with a low around 40.
Wednesday
Mostly sunny, with a high near 71.
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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)
10:56 am CDT Apr 2, 2026
12pm CDT Apr 2, 2026-6pm CDT Apr 8, 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