Showers and Storms continue across the East; Heat, Critical Fire Weather, Drought, and Poor Air Quality continues in the West

A series of fronts will focus locally heavy showers and storms across portions of the central and eastern U.S. through the end of the workweek. Dangerous to extreme heat continues across the Southwest U.S., eventually spreading eastward over the weekend into early next week. Elevated fire weather conditions continue across the Great Basin, with degraded air quality lingering across the Northwest. Read More >

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Partly Cloudy

69°F

21°C

Humidity 92%
Wind Speed E 5 mph
Barometer 30.04 in
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 5 Aug 12:15 am CDT
Extended Forecast for

3 Miles SSW Piasa IL

  • Overnight

    Overnight: Clear, with a low around 67. Calm wind becoming south around 6 mph.

    Low: 67 °F

    Clear

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm.  Sunny, then becoming partly sunny during the afternoon, with a high near 88. South wind 5 to 10 mph.

    High: 88 °F

    Sunny then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely, mainly after 3am.  Mostly cloudy, with a low around 68. Northeast wind 5 to 9 mph becoming light and variable.  Chance of precipitation is 70%.

    Low: 68 °F

    T-storms
    Likely

  • Thursday

    Thursday: Showers and thunderstorms, mainly before 10am.  High near 82. West wind around 6 mph becoming south in the morning.  Chance of precipitation is 80%.

    High: 82 °F

    T-storms then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 68. Light southeast wind.

    Low: 68 °F

    Chance
    T-storms

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly after 1pm.  Partly sunny, with a high near 84.

    High: 84 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 68.

    Low: 68 °F

    Chance
    T-storms

  • Saturday

    Saturday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a low around 67. Calm wind becoming south around 6 mph.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, then becoming partly sunny during the afternoon, with a high near 88. South wind 5 to 10 mph.
Wednesday Night
Showers and thunderstorms likely, mainly after 3am. Mostly cloudy, with a low around 68. Northeast wind 5 to 9 mph becoming light and variable. Chance of precipitation is 70%.
Thursday
Showers and thunderstorms, mainly before 10am. High near 82. West wind around 6 mph becoming south in the morning. Chance of precipitation is 80%.
Thursday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68. Light southeast wind.
Friday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 84.
Friday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Saturday
Mostly sunny, with a high near 87.
Saturday Night
Mostly clear, with a low around 70.
Sunday
A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 89.
Sunday Night
Mostly clear, with a low around 74.
Monday
Sunny, with a high near 92.
Monday Night
Partly cloudy, with a low around 75.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Piasa IL
 39.08°N 90.15°W (Elev. 610 ft)
12:21 am CDT Aug 5, 2026
12am CDT Aug 5, 2026-6pm CDT Aug 11, 2026
 
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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