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.

Fair

23°F

-5°C

Humidity 53%
Wind Speed Calm
Barometer 30.32 in (1026.9 mb)
Dewpoint 8°F (-13°C)
Visibility 10.00 mi
Last update 22 Jan 3:53 am CST
Extended Forecast for

Affton MO

Winter Storm Watch January 24, 12:00am until January 25, 12:00pm
Cold Weather Advisory January 24, 12:00am until January 24, 12:00pm
Click here for hazard details and duration
Winter Storm Watch
Cold Weather Advisory

  • Today

    Today: Partly sunny, with a high near 39. Northwest wind around 5 mph becoming calm in the afternoon.

    High: 39 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 11. Light northwest wind becoming north 9 to 14 mph after midnight. Winds could gust as high as 22 mph.

    Low: 11 °F

    Partly Cloudy

  • Friday

    Friday: Mostly cloudy and cold, with a temperature falling to around 11 by 5pm. North wind 9 to 14 mph, with gusts as high as 23 mph.

    High: 16 °F⇓

    Cold

  • Friday Night

    Friday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 6. Northeast wind around 9 mph.

    Low: 6 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Saturday

    Saturday: Snow, mainly after noon. High near 13. Northeast wind 6 to 9 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    High: 13 °F

    Chance Snow
    then Snow

  • Saturday Night

    Saturday Night: Snow. Low around 9. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.

    Low: 9 °F

    Snow

  • Sunday

    Sunday: A 40 percent chance of snow, mainly before noon. Mostly cloudy and cold, with a high near 17.

    High: 17 °F

    Chance Snow

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 3.

    Low: 3 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 23.

    High: 23 °F

    Sunny

Detailed Forecast

Today
Partly sunny, with a high near 39. Northwest wind around 5 mph becoming calm in the afternoon.
Tonight
Partly cloudy, with a low around 11. Light northwest wind becoming north 9 to 14 mph after midnight. Winds could gust as high as 22 mph.
Friday
Mostly cloudy and cold, with a temperature falling to around 11 by 5pm. North wind 9 to 14 mph, with gusts as high as 23 mph.
Friday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 6. Northeast wind around 9 mph.
Saturday
Snow, mainly after noon. High near 13. Northeast wind 6 to 9 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Saturday Night
Snow. Low around 9. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.
Sunday
A 40 percent chance of snow, mainly before noon. Mostly cloudy and cold, with a high near 17.
Sunday Night
Partly cloudy, with a low around 3.
Monday
Sunny, with a high near 23.
Monday Night
Mostly clear, with a low around 12.
Tuesday
Mostly sunny, with a high near 36.
Tuesday Night
Mostly cloudy, with a low around 17.
Wednesday
Mostly sunny, with a high near 32.
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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:
3:16 am CST Jan 22, 2026
Forecast Valid:
4am CST Jan 22, 2026-6pm CST Jan 28, 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