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

58°F

14°C

Humidity 25%
Wind Speed SE 14 mph
Barometer 30.04 in (1017.4 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Last update 17 Nov 11:53 am CST
Extended Forecast for

Affton MO

  • This Afternoon

    This Afternoon: A 30 percent chance of rain, mainly after 5pm. Increasing clouds, with a high near 58. Southeast wind 9 to 11 mph, with gusts as high as 20 mph.

    High: 58 °F

    Chance Rain

  • Tonight

    Tonight: A 30 percent chance of rain and thunderstorms, mainly before 10pm. Mostly cloudy, with a low around 48. Southeast wind 7 to 10 mph, with gusts as high as 22 mph.

    Low: 48 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: Partly sunny, with a high near 74. South wind around 7 mph becoming northwest in the afternoon.

    High: 74 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 47. North wind around 6 mph becoming calm in the evening.

    Low: 47 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 61. Calm wind.

    High: 61 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 50 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 50.

    Low: 50 °F

    Slight Chance
    Rain then
    Chance Rain

  • Thursday

    Thursday: Rain and possibly a thunderstorm. High near 66. Chance of precipitation is 90%.

    High: 66 °F

    Rain

  • Thursday Night

    Thursday Night: Rain. Low around 56. Chance of precipitation is 80%.

    Low: 56 °F

    Rain

  • Friday

    Friday: Rain likely, mainly before noon. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.

    High: 65 °F

    Rain Likely

Detailed Forecast

This Afternoon
A 30 percent chance of rain, mainly after 5pm. Increasing clouds, with a high near 58. Southeast wind 9 to 11 mph, with gusts as high as 20 mph.
Tonight
A 30 percent chance of rain and thunderstorms, mainly before 10pm. Mostly cloudy, with a low around 48. Southeast wind 7 to 10 mph, with gusts as high as 22 mph.
Tuesday
Partly sunny, with a high near 74. South wind around 7 mph becoming northwest in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 47. North wind around 6 mph becoming calm in the evening.
Wednesday
Mostly cloudy, with a high near 61. Calm wind.
Wednesday Night
A 50 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 50.
Thursday
Rain and possibly a thunderstorm. High near 66. Chance of precipitation is 90%.
Thursday Night
Rain. Low around 56. Chance of precipitation is 80%.
Friday
Rain likely, mainly before noon. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.
Friday Night
A 30 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 45.
Saturday
Partly sunny, with a high near 56.
Saturday Night
Partly cloudy, with a low around 41.
Sunday
Mostly sunny, with a high near 58.
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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:
11:51 am CST Nov 17, 2025
Forecast Valid:
12pm CST Nov 17, 2025-6pm CST Nov 23, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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