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 29.89 in (1011.8 mb)
Dewpoint 71°F (22°C)
Visibility 3.00 mi
Last update 17 Jun 7:53 am CDT
Extended Forecast for

3 Miles ESE Collinsville 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: 89 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 1am, then a slight chance of showers and thunderstorms after 2am. Increasing clouds, with a low around 73. South wind around 7 mph. Chance of precipitation is 20%.

    Low: 73 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms, mainly after 1pm. High near 86. Southwest wind 9 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.

    High: 86 °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 6 to 11 mph. Chance of precipitation is 40%.

    Low: 68 °F

    Chance
    T-storms then
    Chance
    Showers

  • Juneteenth

    Juneteenth: Sunny, with a high near 85. Northwest wind around 6 mph.

    High: 85 °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 90.

    High: 90 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 89. Calm wind becoming south around 5 mph in the afternoon.
Tonight
A slight chance of showers and thunderstorms before 1am, then a slight chance of showers and thunderstorms after 2am. Increasing clouds, with a low around 73. South wind around 7 mph. Chance of precipitation is 20%.
Wednesday
Showers and thunderstorms, mainly after 1pm. High near 86. Southwest wind 9 to 14 mph, with gusts as high as 23 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 6 to 11 mph. Chance of precipitation is 40%.
Juneteenth
Sunny, with a high near 85. Northwest wind around 6 mph.
Thursday Night
Mostly clear, with a low around 68.
Friday
Sunny, with a high near 90.
Friday Night
Mostly clear, with a low around 75.
Saturday
Sunny, with a high near 95.
Saturday Night
Mostly clear, with a low around 77.
Sunday
Sunny, with a high near 95.
Sunday Night
Mostly clear, with a low around 76.
Monday
Sunny, with a high near 94.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ESE Collinsville IL
 38.68°N 89.95°W (Elev. 548 ft)
Last Update:
4:52 am CDT Jun 17, 2025
Forecast Valid:
8am 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