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.

Overcast

32°F

0°C

Humidity 88%
Wind Speed E 9 mph
Barometer 30.25 in (1024.8 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 29 Nov 4:53 am CST
Extended Forecast for

Affton MO

Winter Weather Advisory November 29, 04:57am until November 30, 12:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory November 29, 04:57am until November 30, 12:00am

    NOW until 12:00am Sun

    Winter Weather Advisory

  • Overnight

    Low: 31 °F

    Snow

  • Saturday

    Saturday: Rain and snow, becoming all rain after noon. The snow could be heavy at times. High near 40. Southeast wind 11 to 16 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

    High: 40 °F

    Rain/Snow
    then Rain

  • Saturday Night

    Saturday Night: A 50 percent chance of rain before 9pm. Cloudy, with a low around 25. South wind 13 to 16 mph becoming west after midnight. Winds could gust as high as 32 mph.

    Low: 25 °F

    Chance Rain
    then Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 29. Northwest wind 8 to 15 mph, with gusts as high as 30 mph.

    High: 29 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 20. Northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 20 °F

    Mostly Cloudy

  • Monday

    Monday: A 20 percent chance of snow after noon. Cloudy, with a high near 30.

    High: 30 °F

    Cloudy then
    Slight Chance
    Snow

  • Monday Night

    Monday Night: Snow likely, mainly before midnight. Cloudy, with a low around 23. Chance of precipitation is 70%.

    Low: 23 °F

    Snow Likely

  • Tuesday

    Tuesday: Partly sunny, with a high near 31.

    High: 31 °F

    Partly Sunny

Detailed Forecast

Overnight
Snow. Low around 31. Southeast wind 5 to 9 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of around an inch possible.
Saturday
Rain and snow, becoming all rain after noon. The snow could be heavy at times. High near 40. Southeast wind 11 to 16 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.
Saturday Night
A 50 percent chance of rain before 9pm. Cloudy, with a low around 25. South wind 13 to 16 mph becoming west after midnight. Winds could gust as high as 32 mph.
Sunday
Mostly cloudy, with a high near 29. Northwest wind 8 to 15 mph, with gusts as high as 30 mph.
Sunday Night
Mostly cloudy, with a low around 20. Northwest wind 5 to 7 mph becoming calm in the evening.
Monday
A 20 percent chance of snow after noon. Cloudy, with a high near 30.
Monday Night
Snow likely, mainly before midnight. Cloudy, with a low around 23. Chance of precipitation is 70%.
Tuesday
Partly sunny, with a high near 31.
Tuesday Night
Partly cloudy, with a low around 19.
Wednesday
Mostly sunny, with a high near 39.
Wednesday Night
Mostly cloudy, with a low around 18.
Thursday
Partly sunny, with a high near 28.
Thursday Night
Mostly cloudy, with a low around 21.
Friday
A 20 percent chance of rain. Partly sunny, with a high near 39.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Affton MO
 38.56°N 90.32°W (Elev. 564 ft)
Last Update:
4:46 am CST Nov 29, 2025
Forecast Valid:
4am CST Nov 29, 2025-6pm CST Dec 5, 2025
 
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