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.

Mostly Cloudy

86°F

30°C

Humidity 59%
Wind Speed W 5 mph
Barometer 29.96 in (1014.2 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 25 Jun 12:53 pm CDT
Extended Forecast for

Affton MO

Flood Watch until June 26, 07:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch until June 26, 07:00am

    NOW until 7:00am Fri

    Flood Watch

  • This Afternoon

    High: 86 °F

    Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms, mainly after midnight. Low around 69. Calm wind becoming southeast around 5 mph after midnight. Chance of precipitation is 90%.

    Low: 69 °F

    Chance
    T-storms then
    T-storms

  • Friday

    Friday: Showers and thunderstorms. High near 82. South wind 6 to 9 mph becoming west in the afternoon. Chance of precipitation is 90%.

    High: 82 °F

    T-storms

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms, mainly after 5am. Increasing clouds, with a low around 69. Southwest wind around 6 mph becoming calm in the evening.

    Low: 69 °F

    Chance
    T-storms

  • Saturday

    Saturday: A slight chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 86. Light and variable wind. Chance of precipitation is 40%.

    High: 86 °F

    Partly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 73.

    Low: 73 °F

    Chance
    T-storms

  • Sunday

    Sunday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 76.

    Low: 76 °F

    Mostly Clear

Detailed Forecast

This Afternoon
A 40 percent chance of showers and thunderstorms, mainly after 3pm. Partly sunny, with a high near 86. Light west wind.
Tonight
Showers and thunderstorms, mainly after midnight. Low around 69. Calm wind becoming southeast around 5 mph after midnight. Chance of precipitation is 90%.
Friday
Showers and thunderstorms. High near 82. South wind 6 to 9 mph becoming west in the afternoon. Chance of precipitation is 90%.
Friday Night
A 50 percent chance of showers and thunderstorms, mainly after 5am. Increasing clouds, with a low around 69. Southwest wind around 6 mph becoming calm in the evening.
Saturday
A slight chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 86. Light and variable wind. Chance of precipitation is 40%.
Saturday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 73.
Sunday
Sunny, with a high near 94.
Sunday Night
Mostly clear, with a low around 76.
Monday
Sunny and hot, with a high near 97.
Monday Night
Mostly clear, with a low around 77.
Tuesday
Sunny and hot, with a high near 98.
Tuesday Night
Clear, with a low around 77.
Wednesday
Sunny and hot, with a high near 98.
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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:
1:26 pm CDT Jun 25, 2026
Forecast Valid:
1pm CDT Jun 25, 2026-6pm CDT Jul 1, 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