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

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

76°F

24°C

Humidity 60%
Wind Speed N 6 mph
Barometer 30.05 in (1017.2 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 19 Jun 9:53 am CDT
Extended Forecast for

Festus MO

  • Juneteenth

    Juneteenth: Increasing clouds, with a high near 84. Calm wind.

    High: 84 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Mostly cloudy, with a low around 62. Calm wind.

    Low: 62 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 87. Light and variable wind.

    High: 87 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 66. Calm wind.

    Low: 66 °F

    Partly Cloudy
    then Chance
    T-storms

  • Sunday

    Sunday: Showers and thunderstorms. High near 86. Light southeast wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 90%.

    High: 86 °F

    T-storms

  • Sunday Night

    Sunday Night: Showers and thunderstorms. Low around 66. Chance of precipitation is 90%.

    Low: 66 °F

    T-storms

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 79.

    High: 79 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

Detailed Forecast

Juneteenth
Increasing clouds, with a high near 84. Calm wind.
Tonight
Mostly cloudy, with a low around 62. Calm wind.
Saturday
Mostly sunny, with a high near 87. Light and variable wind.
Saturday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 66. Calm wind.
Sunday
Showers and thunderstorms. High near 86. Light southeast wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 90%.
Sunday Night
Showers and thunderstorms. Low around 66. Chance of precipitation is 90%.
Monday
A 30 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 79.
Monday Night
Partly cloudy, with a low around 60.
Tuesday
Mostly sunny, with a high near 81.
Tuesday Night
Partly cloudy, with a low around 61.
Wednesday
Sunny, with a high near 83.
Wednesday Night
A 20 percent chance of showers. Mostly clear, with a low around 61.
Thursday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Festus MO
 38.22°N 90.42°W (Elev. 499 ft)
Last Update:
8:41 am CDT Jun 19, 2026
Forecast Valid:
10am CDT Jun 19, 2026-6pm CDT Jun 25, 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