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/Mist

71°F

22°C

Humidity 100%
Wind Speed Calm
Barometer 29.85 in (1010.2 mb)
Dewpoint 71°F (22°C)
Visibility 1.00 mi
Last update 17 Jun 5:53 am CDT
Extended Forecast for

3 Miles ENE Valmeyer IL

Dense Fog Advisory until June 17, 09:00am
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory until June 17, 09:00am

    NOW until 9:00am Tue

    Dense Fog Advisory

  • Today

    High: 90 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 73. South wind 5 to 7 mph.

    Low: 73 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms, mainly after 1pm. High near 88. Southwest wind 8 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.

    High: 88 °F

    Chance
    T-storms then
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Mostly cloudy, with a low around 68. Southwest wind 5 to 10 mph. Chance of precipitation is 40%.

    Low: 68 °F

    Chance
    T-storms then
    Chance
    Showers

  • Juneteenth

    Juneteenth: Sunny, with a high near 86. West wind 3 to 5 mph.

    High: 86 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 75.

    Low: 75 °F

    Clear

Detailed Forecast

Today
Patchy fog between 7am and 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 90. Light southwest wind.
Tonight
A 20 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 73. South wind 5 to 7 mph.
Wednesday
Showers and thunderstorms, mainly after 1pm. High near 88. Southwest wind 8 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.
Wednesday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Mostly cloudy, with a low around 68. Southwest wind 5 to 10 mph. Chance of precipitation is 40%.
Juneteenth
Sunny, with a high near 86. West wind 3 to 5 mph.
Thursday Night
Mostly clear, with a low around 68.
Friday
Sunny, with a high near 92.
Friday Night
Clear, with a low around 75.
Saturday
Sunny and hot, with a high near 97.
Saturday Night
Clear, with a low around 77.
Sunday
Sunny and hot, with a high near 97.
Sunday Night
Mostly clear, with a low around 76.
Monday
Sunny, with a high near 95.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ENE Valmeyer IL
 38.33°N 90.27°W (Elev. 459 ft)
Last Update:
4:52 am CDT Jun 17, 2025
Forecast Valid:
6am CDT Jun 17, 2025-6pm CDT Jun 23, 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