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

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

81°F

27°C

Humidity 79%
Wind Speed Vrbl 3 mph
Barometer 30.09 in (1018.6 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 2 Jul 7:53 am CDT
Extended Forecast for

Festus MO

Extreme Heat Warning July 2, 08:48am until July 3, 10:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning July 2, 08:48am until July 3, 10:00pm

    NOW until 10:00pm Fri

    Extreme Heat Warning

  • Today

    High: 96 °F

    Sunny then
    Slight Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 76. Light south wind.

    Low: 76 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 97. Heat index values as high as 110. Calm wind becoming south around 5 mph in the afternoon.

    High: 97 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 75. Light south wind.

    Low: 75 °F

    Mostly Clear

  • Independence Day

    Independence Day: A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 96. Light southwest wind.

    High: 96 °F

    Sunny then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 73. Chance of precipitation is 30%.

    Low: 73 °F

    Chance
    Showers

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 94.

    High: 94 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 2pm. Increasing clouds, with a high near 96. Heat index values as high as 112. Calm wind becoming south around 6 mph in the afternoon.
Tonight
A 20 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 76. Light south wind.
Friday
Sunny and hot, with a high near 97. Heat index values as high as 110. Calm wind becoming south around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 75. Light south wind.
Independence Day
A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 96. Light southwest wind.
Saturday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 73. Chance of precipitation is 30%.
Sunday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 94.
Sunday Night
Partly cloudy, with a low around 72.
Monday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91.
Monday Night
A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 71.
Tuesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Festus MO
 38.22°N 90.39°W (Elev. 446 ft)
Last Update:
8:21 am CDT Jul 2, 2026
Forecast Valid:
8am CDT Jul 2, 2026-6pm CDT Jul 8, 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