National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fog

N/A

Humidity NA
Wind Speed S 3 mph
Barometer 29.87 in
Dewpoint N/A
Visibility 0.15 mi
Last update 17 Jun 6:15 am CDT
Extended Forecast for

3 Miles SSW Piasa IL

  • Today

    Today: Cloudy through mid morning, then gradual clearing, with a high near 88. Calm wind becoming south around 5 mph in the afternoon.

    High: 88 °F

    Gradual
    Clearing

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 5am. Partly cloudy, with a low around 71. South wind 6 to 8 mph.

    Low: 71 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms likely before 1pm, then showers and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms after 4pm. High near 82. Southwest wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.

    High: 82 °F

    T-storms

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Low around 66. Southwest wind 6 to 11 mph. Chance of precipitation is 80%.

    Low: 66 °F

    T-storms then
    Chance
    Showers

  • Juneteenth

    Juneteenth: Sunny, with a high near 83. West wind 5 to 7 mph.

    High: 83 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 74.

    Low: 74 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

Detailed Forecast

Today
Cloudy through mid morning, then gradual clearing, with a high near 88. Calm wind becoming south around 5 mph in the afternoon.
Tonight
A 30 percent chance of showers and thunderstorms, mainly after 5am. Partly cloudy, with a low around 71. South wind 6 to 8 mph.
Wednesday
Showers and thunderstorms likely before 1pm, then showers and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms after 4pm. High near 82. Southwest wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.
Wednesday Night
Showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Low around 66. Southwest wind 6 to 11 mph. Chance of precipitation is 80%.
Juneteenth
Sunny, with a high near 83. West wind 5 to 7 mph.
Thursday Night
Mostly clear, with a low around 66.
Friday
Sunny, with a high near 89.
Friday Night
Mostly clear, with a low around 74.
Saturday
Sunny, with a high near 94.
Saturday Night
Mostly clear, with a low around 76.
Sunday
Sunny, with a high near 94.
Sunday Night
Mostly clear, with a low around 75.
Monday
Sunny, with a high near 92.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Piasa IL
 39.08°N 90.15°W (Elev. 610 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