National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

78°F

26°C

Humidity 67%
Wind Speed S 15 G 23 mph
Barometer 29.54 in (999.6 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 17 Jun 8:54 am CDT
Extended Forecast for

4 Miles S St. Charles County Smartt Airport MO

Wind Advisory June 17, 01:00pm until June 17, 08:00pm
Click here for hazard details and duration
Wind Advisory

  • Today

    Today: A 30 percent chance of showers and thunderstorms, mainly before 2pm. Mostly sunny, with a high near 92. Breezy, with a southwest wind 14 to 19 mph increasing to 23 to 28 mph in the afternoon. Winds could gust as high as 46 mph.

    High: 92 °F

    Chance
    T-storms and
    Breezy

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 9pm. Mostly cloudy, with a low around 68. Breezy, with a west wind 17 to 22 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 36 mph. Chance of precipitation is 70%.

    Low: 68 °F

    T-storms
    Likely and
    Breezy then
    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers, mainly between 1pm and 4pm. Increasing clouds, with a high near 79. Northwest wind 7 to 9 mph.

    High: 79 °F

    Mostly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 60. Northwest wind around 6 mph becoming calm in the evening.

    Low: 60 °F

    Decreasing
    Clouds

  • Juneteenth

    Juneteenth: Sunny, with a high near 84. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 84 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 68.

    Low: 68 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 86. Chance of precipitation is 70%.

    High: 86 °F

    Heavy Rain

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms, mainly before 2pm. Mostly sunny, with a high near 92. Breezy, with a southwest wind 14 to 19 mph increasing to 23 to 28 mph in the afternoon. Winds could gust as high as 46 mph.
Tonight
Showers and thunderstorms likely, mainly before 9pm. Mostly cloudy, with a low around 68. Breezy, with a west wind 17 to 22 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 36 mph. Chance of precipitation is 70%.
Thursday
A 30 percent chance of showers, mainly between 1pm and 4pm. Increasing clouds, with a high near 79. Northwest wind 7 to 9 mph.
Thursday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 60. Northwest wind around 6 mph becoming calm in the evening.
Juneteenth
Sunny, with a high near 84. Calm wind becoming northwest around 5 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 64.
Saturday
Mostly sunny, with a high near 87.
Saturday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 68.
Sunday
Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 86. Chance of precipitation is 70%.
Sunday Night
Showers and possibly a thunderstorm. Low around 67. Chance of precipitation is 80%.
Monday
A 20 percent chance of showers. Partly sunny, with a high near 81.
Monday Night
Partly cloudy, with a low around 62.
Tuesday
A 20 percent chance of showers. Partly sunny, with a high near 82.
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Forecast Area
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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)
Last Update:
8:56 am CDT Jun 17, 2026
Forecast Valid:
9am CDT Jun 17, 2026-6pm CDT Jun 23, 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