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

70°F

21°C

Humidity 90%
Wind Speed Calm
Barometer 30.01 in (1015.7 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 20 Jun 6:54 am CDT
Extended Forecast for

4 Miles ENE Cave MO

Heat Advisory June 21, 12:00pm until June 24, 09:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: Mostly sunny, with a high near 91. Heat index values as high as 100. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 91 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 76. South wind around 9 mph, with gusts as high as 21 mph.

    Low: 76 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 94. Heat index values as high as 105. Southwest wind 9 to 14 mph, with gusts as high as 26 mph.

    High: 94 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 75. South wind 6 to 9 mph, with gusts as high as 22 mph.

    Low: 75 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 94. South wind 6 to 10 mph, with gusts as high as 22 mph.

    High: 94 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 75.

    Low: 75 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 74.

    Low: 74 °F

    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 93. Chance of precipitation is 20%.

    High: 93 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

Detailed Forecast

Today
Mostly sunny, with a high near 91. Heat index values as high as 100. South wind 5 to 10 mph, with gusts as high as 20 mph.
Tonight
Mostly clear, with a low around 76. South wind around 9 mph, with gusts as high as 21 mph.
Saturday
Sunny, with a high near 94. Heat index values as high as 105. Southwest wind 9 to 14 mph, with gusts as high as 26 mph.
Saturday Night
Clear, with a low around 75. South wind 6 to 9 mph, with gusts as high as 22 mph.
Sunday
Sunny, with a high near 94. South wind 6 to 10 mph, with gusts as high as 22 mph.
Sunday Night
Clear, with a low around 75.
Monday
Sunny, with a high near 94.
Monday Night
Mostly clear, with a low around 74.
Tuesday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 93. Chance of precipitation is 20%.
Tuesday Night
Partly cloudy, with a low around 73.
Wednesday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 92.
Wednesday Night
Mostly clear, with a low around 73.
Thursday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 91.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ENE Cave MO
 39.04°N 90.98°W (Elev. 636 ft)
Last Update:
5:37 am CDT Jun 20, 2025
Forecast Valid:
7am CDT Jun 20, 2025-6pm CDT Jun 26, 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