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

90°F

32°C

Humidity 52%
Wind Speed SW 7 mph
Barometer 30.02 in (1015.8 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index96°F (36°C)
Last update 25 Jun 7:54 pm CDT
Extended Forecast for

4 Miles SE Silex MO

Heat Advisory June 25, 08:47pm until June 26, 09:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory June 25, 08:47pm until June 26, 09:00pm

    NOW until 9:00pm Thu

    Heat Advisory

  • Tonight

    Low: 73 °F

    Slight Chance
    T-storms then
    Clear

  • Thursday

    Thursday: Sunny, with a high near 93. Heat index values as high as 103. Southwest wind 5 to 9 mph.

    High: 93 °F

    Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 73. Southwest wind 5 to 9 mph.

    Low: 73 °F

    Slight Chance
    T-storms

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 10am. Partly sunny, with a high near 89. Southwest wind 5 to 8 mph. Chance of precipitation is 50%.

    High: 89 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. West wind around 5 mph becoming calm in the evening.

    Low: 71 °F

    Chance
    T-storms

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.

    High: 91 °F

    Chance
    Showers then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 73.

    Low: 73 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 91.

    High: 91 °F

    Chance
    T-storms

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms before 9pm. Mostly clear, with a low around 73. South wind 3 to 5 mph.
Thursday
Sunny, with a high near 93. Heat index values as high as 103. Southwest wind 5 to 9 mph.
Thursday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 73. Southwest wind 5 to 9 mph.
Friday
A chance of showers, with thunderstorms also possible after 10am. Partly sunny, with a high near 89. Southwest wind 5 to 8 mph. Chance of precipitation is 50%.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. West wind around 5 mph becoming calm in the evening.
Saturday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Saturday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 73.
Sunday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 91.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.
Monday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 87. Chance of precipitation is 60%.
Monday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
Tuesday
A 20 percent chance of showers. Mostly sunny, with a high near 86.
Tuesday Night
Partly cloudy, with a low around 65.
Wednesday
A 20 percent chance of showers. Mostly sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SE Silex MO
 39.08°N 91.01°W (Elev. 482 ft)
Last Update:
5:52 pm CDT Jun 25, 2025
Forecast Valid:
8pm CDT Jun 25, 2025-6pm CDT Jul 2, 2025
 
Forecast Discussion
 
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Additional Resources

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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