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.

A Few Clouds

89°F

32°C

Humidity 61%
Wind Speed SW 16 mph
Barometer 29.95 in (1013.5 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index98°F (37°C)
Last update 21 Jun 10:54 am CDT
Extended Forecast for

3 Miles WNW Winfield MO

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

  • Today

    Today: Sunny, with a high near 95. Heat index values as high as 105. Southwest wind 10 to 14 mph, with gusts as high as 25 mph.

    High: 95 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 75. South wind 7 to 11 mph, with gusts as high as 22 mph.

    Low: 75 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 95. Heat index values as high as 105. Southwest wind 7 to 13 mph, with gusts as high as 22 mph.

    High: 95 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 75. South wind 6 to 9 mph.

    Low: 75 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 94. Southwest wind 6 to 8 mph.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.

    High: 93 °F

    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 74.

    Low: 74 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 92.

    High: 92 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 95. Heat index values as high as 105. Southwest wind 10 to 14 mph, with gusts as high as 25 mph.
Tonight
Clear, with a low around 75. South wind 7 to 11 mph, with gusts as high as 22 mph.
Sunday
Sunny, with a high near 95. Heat index values as high as 105. Southwest wind 7 to 13 mph, with gusts as high as 22 mph.
Sunday Night
Clear, with a low around 75. South wind 6 to 9 mph.
Monday
Sunny, with a high near 94. Southwest wind 6 to 8 mph.
Monday Night
Mostly clear, with a low around 75.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
Tuesday Night
Partly cloudy, with a low around 74.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 92.
Wednesday Night
Mostly clear, with a low around 74.
Thursday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 92.
Thursday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Winfield MO
 39.01°N 90.81°W (Elev. 600 ft)
Last Update:
9:37 am CDT Jun 21, 2025
Forecast Valid:
11am CDT Jun 21, 2025-6pm CDT Jun 27, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation