Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Overcast

89°F

32°C

Humidity 48%
Wind Speed SW 16 G 25 mph
Barometer 29.40 in (995.0 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 17 Jun 5:54 pm CDT
Extended Forecast for

4 Miles S St. Charles County Smartt Airport MO

Tornado Watch until June 17, 10:00pm
Wind Advisory June 17, 06:27pm until June 17, 08:00pm
Click here for hazard details and duration
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  •  
    Tornado Watch until June 17, 10:00pm
    Wind Advisory June 17, 06:27pm until June 17, 08:00pm

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Tonight

    Low: 68 °F

    Severe
    Thunderstorms
    and Breezy
    then Partly
    Cloudy

  • Thursday

    Thursday: Isolated showers between 1pm and 4pm.  Mostly sunny, with a high near 81. Northwest wind 6 to 9 mph.  Chance of precipitation is 20%.

    High: 81 °F

    Sunny then
    Isolated
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, then gradually becoming clear, with a low around 60. West wind 5 to 7 mph becoming calm  in the evening.

    Low: 60 °F

    Decreasing
    Clouds

  • Juneteenth

    Juneteenth: Sunny, with a high near 85. Calm wind becoming north around 5 mph in the afternoon.

    High: 85 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 65. North wind around 5 mph becoming calm  in the evening.

    Low: 65 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 86.

    High: 86 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 68.

    Low: 68 °F

    Chance
    T-storms

  • Sunday

    Sunday: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall.  High near 84. Chance of precipitation is 80%.

    High: 84 °F

    Heavy Rain

Detailed Forecast

Tonight
Showers and thunderstorms likely, mainly before 11pm. Some of the storms could be severe. Cloudy, then gradually becoming partly cloudy, with a low around 68. Breezy, with a west wind 19 to 24 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 39 mph. Chance of precipitation is 60%.
Thursday
Isolated showers between 1pm and 4pm. Mostly sunny, with a high near 81. Northwest wind 6 to 9 mph. Chance of precipitation is 20%.
Thursday Night
Mostly cloudy, then gradually becoming clear, with a low around 60. West wind 5 to 7 mph becoming calm in the evening.
Juneteenth
Sunny, with a high near 85. Calm wind becoming north around 5 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 65. North wind around 5 mph becoming calm in the evening.
Saturday
Partly sunny, with a high near 86.
Saturday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Sunday
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 84. Chance of precipitation is 80%.
Sunday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 65. Chance of precipitation is 80%.
Monday
Partly sunny, with a high near 80.
Monday Night
Partly cloudy, with a low around 61.
Tuesday
Mostly sunny, with a high near 82.
Tuesday Night
Partly cloudy, with a low around 63.
Wednesday
Mostly sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S St. Charles County Smartt Airport MO
 38.87°N 90.45°W (Elev. 436 ft)
5:51 pm CDT Jun 17, 2026
6pm CDT Jun 17, 2026-6pm CDT Jun 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