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.

Fog

46°F

8°C

Humidity 100%
Wind Speed E 5 mph
Barometer 29.96 in (1014.6 mb)
Dewpoint 46°F (8°C)
Visibility 0.50 mi
Wind Chill44°F (7°C)
Last update 27 Dec 5:53 am CST
Extended Forecast for

Sappington MO

Dense Fog Advisory December 27, 06:03am until December 27, 09:00am
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory December 27, 06:03am until December 27, 09:00am

    NOW until 9:00am Sat

    Dense Fog Advisory

  • Today

    High: 65 °F

    Areas Dense
    Fog then
    Mostly Cloudy

  • Tonight

    Tonight: A 20 percent chance of showers after 11pm. Cloudy, with a low around 60. South wind around 7 mph.

    Low: 60 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: Showers, with thunderstorms also possible after 3pm. High near 72. South wind 6 to 15 mph becoming west in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 80%.

    High: 72 °F

    Chance
    Showers then
    Showers

  • Sunday Night

    Sunday Night: A 40 percent chance of showers before 9pm. Cloudy during the early evening, then gradual clearing, with a low around 18. Northwest wind 15 to 18 mph, with gusts as high as 33 mph.

    Low: 18 °F

    Chance
    Showers then
    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 27. Northwest wind 13 to 18 mph, with gusts as high as 32 mph.

    High: 27 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 18.

    Low: 18 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 35.

    High: 35 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 27.

    Low: 27 °F

    Mostly Clear

Detailed Forecast

Today
Areas of dense fog before 10am. Otherwise, mostly cloudy, with a high near 65. Southeast wind 3 to 8 mph.
Tonight
A 20 percent chance of showers after 11pm. Cloudy, with a low around 60. South wind around 7 mph.
Sunday
Showers, with thunderstorms also possible after 3pm. High near 72. South wind 6 to 15 mph becoming west in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 80%.
Sunday Night
A 40 percent chance of showers before 9pm. Cloudy during the early evening, then gradual clearing, with a low around 18. Northwest wind 15 to 18 mph, with gusts as high as 33 mph.
Monday
Mostly sunny, with a high near 27. Northwest wind 13 to 18 mph, with gusts as high as 32 mph.
Monday Night
Mostly clear, with a low around 18.
Tuesday
Sunny, with a high near 35.
Tuesday Night
Mostly clear, with a low around 27.
Wednesday
Mostly sunny, with a high near 44.
Wednesday Night
Partly cloudy, with a low around 24.
New Year's Day
Mostly sunny, with a high near 35.
Thursday Night
Partly cloudy, with a low around 15.
Friday
Partly sunny, with a high near 33.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sappington MO
 38.51°N 90.38°W (Elev. 607 ft)
Last Update:
4:41 am CST Dec 27, 2025
Forecast Valid:
6am CST Dec 27, 2025-6pm CST Jan 2, 2026
 
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