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.

Mostly Cloudy and Breezy

82°F

28°C

Humidity 58%
Wind Speed SW 21 G 33 mph
Barometer 29.79 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 18 Jun 11:50 am CDT
Extended Forecast for

Piasa IL

  • This Afternoon

    This Afternoon: Showers and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms, mainly between 1pm and 4pm. High near 83. West wind 14 to 17 mph, with gusts as high as 36 mph. Chance of precipitation is 80%.

    High: 83 °F

    Showers

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly before midnight. Partly cloudy, with a low around 65. West wind 7 to 11 mph.

    Low: 65 °F

    Chance
    T-storms

  • Juneteenth

    Juneteenth: Sunny, with a high near 83. Northwest wind around 8 mph.

    High: 83 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 65. Calm wind becoming south around 5 mph after midnight.

    Low: 65 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 89. South wind 5 to 10 mph.

    High: 89 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

  • Saturday Night

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

    Low: 75 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms, mainly between 1pm and 4pm. High near 83. West wind 14 to 17 mph, with gusts as high as 36 mph. Chance of precipitation is 80%.
Tonight
A 40 percent chance of showers and thunderstorms, mainly before midnight. Partly cloudy, with a low around 65. West wind 7 to 11 mph.
Juneteenth
Sunny, with a high near 83. Northwest wind around 8 mph.
Thursday Night
Mostly clear, with a low around 65. Calm wind becoming south around 5 mph after midnight.
Friday
Sunny, with a high near 89. South wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around 73.
Saturday
Sunny, with a high near 93.
Saturday Night
Mostly clear, with a low around 75.
Sunday
Sunny, with a high near 94.
Sunday Night
Mostly clear, with a low around 75.
Monday
Sunny, with a high near 93.
Monday Night
Partly cloudy, with a low around 74.
Tuesday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 92.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Piasa IL
 39.1°N 90.15°W (Elev. 584 ft)
Last Update:
12:36 pm CDT Jun 18, 2025
Forecast Valid:
12pm CDT Jun 18, 2025-6pm CDT Jun 24, 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