Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

A Few Clouds

85°F

29°C

Humidity 50%
Wind Speed S 20 G 26 mph
Barometer 29.75 in (1007.0 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 17 Apr 2:54 pm CDT
Extended Forecast for

4 Miles E Portage Des Sioux MO

Tornado Watch until April 17, 11:00pm
Severe T-storm Warning until April 17, 04:15pm
Click here for hazard details and duration
Tornado Watch
Severe T-storm Warning
  •  
    Tornado Watch until April 17, 11:00pm
    Severe T-storm Warning until April 17, 04:15pm

    NOW: Multiple hazards in effect

    Click HERE for Details

  • This Afternoon

    High: 86 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms.  Low around 47. South wind 10 to 14 mph becoming west after midnight. Winds could gust as high as 22 mph.  Chance of precipitation is 100%.

    Low: 47 °F

    T-storms

  • Saturday

    Saturday: A 30 percent chance of showers before 8am.  Cloudy through mid morning, then gradual clearing, with a high near 59. Northwest wind around 17 mph, with gusts as high as 26 mph.

    High: 59 °F

    Chance
    Showers then
    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 39. Northwest wind 8 to 13 mph becoming light and variable  after midnight. Winds could gust as high as 20 mph.

    Low: 39 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 68. Light west wind increasing to 9 to 14 mph in the morning. Winds could gust as high as 22 mph.

    High: 68 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 70.

    High: 70 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 86. South wind around 17 mph, with gusts as high as 26 mph.
Tonight
Showers and thunderstorms. Low around 47. South wind 10 to 14 mph becoming west after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 100%.
Saturday
A 30 percent chance of showers before 8am. Cloudy through mid morning, then gradual clearing, with a high near 59. Northwest wind around 17 mph, with gusts as high as 26 mph.
Saturday Night
Clear, with a low around 39. Northwest wind 8 to 13 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.
Sunday
Sunny, with a high near 68. Light west wind increasing to 9 to 14 mph in the morning. Winds could gust as high as 22 mph.
Sunday Night
Mostly clear, with a low around 41.
Monday
Sunny, with a high near 70.
Monday Night
Mostly clear, with a low around 52.
Tuesday
Mostly sunny, with a high near 80.
Tuesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 58. Chance of precipitation is 20%.
Wednesday
Sunny, with a high near 82.
Wednesday Night
Mostly clear, with a low around 60.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85.
Thursday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
Friday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 80.
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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)
3:01 pm CDT Apr 17, 2026
3pm CDT Apr 17, 2026-6pm CDT Apr 24, 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