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

84°F

29°C

Humidity 41%
Wind Speed S 9 mph
Barometer 29.79 in (1008.5 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 17 Oct 4:53 pm CDT
Extended Forecast for

Affton MO

  • Tonight

    Tonight: Mostly clear, with a low around 64. South wind 6 to 8 mph.

    Low: 64 °F

    Mostly Clear

  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 10am. Some of the storms could produce heavy rainfall. High near 74. Southwest wind 6 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.

    High: 74 °F

    Heavy Rain

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 51. Southwest wind 7 to 14 mph becoming west after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 90%.

    Low: 51 °F

    Heavy Rain

  • Sunday

    Sunday: Sunny, with a high near 64. Northwest wind around 15 mph, with gusts as high as 28 mph.

    High: 64 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 46. West wind 5 to 7 mph becoming light and variable.

    Low: 46 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 51.

    Low: 51 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 64. South wind 6 to 8 mph.
Saturday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 10am. Some of the storms could produce heavy rainfall. High near 74. Southwest wind 6 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.
Saturday Night
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 51. Southwest wind 7 to 14 mph becoming west after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 90%.
Sunday
Sunny, with a high near 64. Northwest wind around 15 mph, with gusts as high as 28 mph.
Sunday Night
Clear, with a low around 46. West wind 5 to 7 mph becoming light and variable.
Monday
Sunny, with a high near 73.
Monday Night
Mostly clear, with a low around 51.
Tuesday
Sunny, with a high near 64.
Tuesday Night
Mostly clear, with a low around 42.
Wednesday
Sunny, with a high near 66.
Wednesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 48.
Thursday
A 30 percent chance of showers. Mostly sunny, with a high near 70.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 47.
Friday
Mostly sunny, with a high near 67.
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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:
4:16 pm CDT Oct 17, 2025
Forecast Valid:
5pm CDT Oct 17, 2025-6pm CDT Oct 24, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation