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NWS St. Louis Announces Changes To May 16, 2025 Tornado Damage Assessment

After a year-long review of new ground survey data and aerial imagery, NWS St. Louis made several adjustments to the May 16, 2025 tornado damage assessment. Read More >

Hazardous Weather Conditions

Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

91°F

33°C

Humidity 56%
Wind Speed SW 13 mph
Barometer 29.89 in (1011.5 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index100°F (38°C)
Last update 9 Jun 4:54 pm CDT
Extended Forecast for

St. Charles County Smartt Airport MO

Heat Advisory June 9, 05:51pm until June 9, 10:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory June 9, 05:51pm until June 9, 10:00pm

    NOW until 10:00pm Tue

    Heat Advisory

  • This Afternoon

    High: 91 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Mostly clear, with a low around 74. Southwest wind 6 to 8 mph.

    Low: 74 °F

    Mostly Clear

  • Wednesday

    Wednesday: Increasing clouds, with a high near 94. Heat index values as high as 102. Southwest wind 8 to 15 mph, with gusts as high as 24 mph.

    High: 94 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms between midnight and 1am. Mostly cloudy, then gradually becoming clear, with a low around 75. Southwest wind 9 to 14 mph. Chance of precipitation is 20%.

    Low: 75 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 94. South wind 9 to 18 mph, with gusts as high as 29 mph.

    High: 94 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 1am, then a slight chance of showers and thunderstorms between 1am and 4am, then a slight chance of showers after 4am. Low around 66. Chance of precipitation is 80%.

    Low: 66 °F

    Showers

  • Friday

    Friday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91. Heat index values as high as 102. Southwest wind around 9 mph.
Tonight
Mostly clear, with a low around 74. Southwest wind 6 to 8 mph.
Wednesday
Increasing clouds, with a high near 94. Heat index values as high as 102. Southwest wind 8 to 15 mph, with gusts as high as 24 mph.
Wednesday Night
A slight chance of showers and thunderstorms between midnight and 1am. Mostly cloudy, then gradually becoming clear, with a low around 75. Southwest wind 9 to 14 mph. Chance of precipitation is 20%.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 94. South wind 9 to 18 mph, with gusts as high as 29 mph.
Thursday Night
Showers and possibly a thunderstorm before 1am, then a slight chance of showers and thunderstorms between 1am and 4am, then a slight chance of showers after 4am. Low around 66. Chance of precipitation is 80%.
Friday
Sunny, with a high near 85.
Friday Night
Mostly clear, with a low around 64.
Saturday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.
Saturday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Sunday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 83.
Sunday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
Monday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 80.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 59.
Tuesday
A 20 percent chance of showers. Mostly sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
St. Charles County Smartt Airport MO
 38.94°N 90.45°W (Elev. 427 ft)
Last Update:
2:56 pm CDT Jun 9, 2026
Forecast Valid:
5pm CDT Jun 9, 2026-6pm CDT Jun 16, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation