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.

A Few Clouds

87°F

31°C

Humidity 55%
Wind Speed Vrbl 3 mph
Barometer 29.80 in (1008.8 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 17 Jun 5:53 pm CDT
Extended Forecast for

Affton MO

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 73. South wind around 6 mph.

    Low: 73 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Some of the storms could produce heavy rainfall. Partly sunny, with a high near 87. Southwest wind 7 to 11 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.

    High: 87 °F

    Chance
    T-storms then
    Heavy Rain

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms, mainly before 9pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 68. West wind 5 to 9 mph.

    Low: 68 °F

    Heavy Rain
    then Partly
    Cloudy

  • Juneteenth

    Juneteenth: Sunny, with a high near 86. Northwest wind 3 to 5 mph.

    High: 86 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 67. Calm wind.

    Low: 67 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 91.

    High: 91 °F

    Sunny

  • Friday Night

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

    Low: 74 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 77.

    Low: 77 °F

    Mostly Clear

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 73. South wind around 6 mph.
Wednesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Some of the storms could produce heavy rainfall. Partly sunny, with a high near 87. Southwest wind 7 to 11 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Wednesday Night
A 40 percent chance of showers and thunderstorms, mainly before 9pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 68. West wind 5 to 9 mph.
Juneteenth
Sunny, with a high near 86. Northwest wind 3 to 5 mph.
Thursday Night
Mostly clear, with a low around 67. Calm wind.
Friday
Sunny, with a high near 91.
Friday Night
Mostly clear, with a low around 74.
Saturday
Sunny, with a high near 96.
Saturday Night
Mostly clear, with a low around 77.
Sunday
Sunny and hot, with a high near 97.
Sunday Night
Mostly clear, with a low around 76.
Monday
Sunny, with a high near 95.
Monday Night
Mostly clear, with a low around 76.
Tuesday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 94.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Affton MO
 38.56°N 90.32°W (Elev. 564 ft)
Last Update:
2:52 pm CDT Jun 17, 2025
Forecast Valid:
6pm CDT Jun 17, 2025-6pm CDT Jun 24, 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