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

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Overcast and Breezy

43°F

6°C

Humidity 81%
Wind Speed NW 21 G 30 mph
Barometer 30.06 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 11 Mar 4:45 pm CDT
Extended Forecast for

Piasa IL

  • Tonight

    Tonight: Mostly cloudy during the early evening, then gradual clearing, with a low around 29. Blustery, with a northwest wind 17 to 22 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 32 mph.

    Low: 29 °F

    Decreasing
    Clouds and
    Blustery then
    Clear

  • Thursday

    Thursday: Sunny, with a high near 53. West wind 6 to 13 mph.

    High: 53 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 42. Breezy, with a south wind 14 to 22 mph, with gusts as high as 32 mph.

    Low: 42 °F

    Partly Cloudy
    and Breezy

  • Friday

    Friday: Partly sunny, with a high near 58. West wind 14 to 18 mph, with gusts as high as 26 mph.

    High: 58 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 34. Northwest wind 6 to 8 mph becoming northeast after midnight.

    Low: 34 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 58.

    High: 58 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 47.

    Low: 47 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Sunday

    Sunday: Rain likely and possibly a thunderstorm, then rain after 1pm. High near 64. Breezy. Chance of precipitation is 80%.

    High: 64 °F

    Rain and
    Breezy

  • Sunday Night

    Sunday Night: A chance of rain and snow before 1am. Mostly cloudy, with a low around 21. Blustery. Chance of precipitation is 30%.

    Low: 21 °F

    Chance
    Rain/Snow and
    Blustery

Detailed Forecast

Tonight
Mostly cloudy during the early evening, then gradual clearing, with a low around 29. Blustery, with a northwest wind 17 to 22 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 32 mph.
Thursday
Sunny, with a high near 53. West wind 6 to 13 mph.
Thursday Night
Partly cloudy, with a low around 42. Breezy, with a south wind 14 to 22 mph, with gusts as high as 32 mph.
Friday
Partly sunny, with a high near 58. West wind 14 to 18 mph, with gusts as high as 26 mph.
Friday Night
Mostly cloudy, with a low around 34. Northwest wind 6 to 8 mph becoming northeast after midnight.
Saturday
Mostly cloudy, with a high near 58.
Saturday Night
A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 47.
Sunday
Rain likely and possibly a thunderstorm, then rain after 1pm. High near 64. Breezy. Chance of precipitation is 80%.
Sunday Night
A chance of rain and snow before 1am. Mostly cloudy, with a low around 21. Blustery. Chance of precipitation is 30%.
Monday
Partly sunny, with a high near 33. Breezy.
Monday Night
Mostly clear, with a low around 14.
Tuesday
Partly sunny, with a high near 40.
Tuesday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 30. Chance of precipitation is 20%.
Wednesday
Partly sunny, with a high near 53.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Piasa IL
 39.1°N 90.12°W (Elev. 643 ft)
Last Update:
3:01 pm CDT Mar 11, 2026
Forecast Valid:
5pm CDT Mar 11, 2026-6pm CDT Mar 18, 2026
 
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