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.

Thunderstorm in Vicinity Heavy Rain Fog/Mist

72°F

22°C

Humidity 94%
Wind Speed S 6 mph
Barometer 29.77 in (1007.5 mb)
Dewpoint 70°F (21°C)
Visibility 2.00 mi
Last update 21 Jun 12:54 pm CDT
Extended Forecast for

3 Miles NE Troy MO

Flood Watch June 21, 01:03pm until June 21, 07:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch June 21, 01:03pm until June 21, 07:00pm

    NOW until 7:00pm Sun

    Flood Watch

  • This Afternoon

    High: 78 °F

    Heavy Rain

  • Tonight

    Tonight: Scattered showers and thunderstorms, mainly before 7pm. Mostly cloudy, with a low around 61. West wind 5 to 9 mph becoming northwest after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 30%.

    Low: 61 °F

    Scattered
    T-storms then
    Cloudy

  • Monday

    Monday: Cloudy, then gradually becoming mostly sunny, with a high near 76. North wind around 6 mph.

    High: 76 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Mostly clear, with a low around 58. Light north wind.

    Low: 58 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 80. Calm wind.

    High: 80 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 83.

    High: 83 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
Showers and thunderstorms likely, mainly before 2pm. Some of the storms could produce heavy rainfall. Cloudy, with a high near 78. Southwest wind 6 to 11 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Tonight
Scattered showers and thunderstorms, mainly before 7pm. Mostly cloudy, with a low around 61. West wind 5 to 9 mph becoming northwest after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 30%.
Monday
Cloudy, then gradually becoming mostly sunny, with a high near 76. North wind around 6 mph.
Monday Night
Mostly clear, with a low around 58. Light north wind.
Tuesday
Sunny, with a high near 80. Calm wind.
Tuesday Night
Mostly clear, with a low around 61.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 83.
Wednesday Night
Partly cloudy, with a low around 63.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 83.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 61. Chance of precipitation is 20%.
Friday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 83.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Saturday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NE Troy MO
 39.01°N 90.96°W (Elev. 499 ft)
Last Update:
12:31 pm CDT Jun 21, 2026
Forecast Valid:
1pm CDT Jun 21, 2026-6pm CDT Jun 27, 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