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Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

41°F

5°C

Humidity 87%
Wind Speed N 6 mph
Barometer 30.54 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill37°F (3°C)
Last update 17 Oct 6:50 am CDT
Extended Forecast for

2 Miles SW Piasa IL

Frost Advisory October 17, 07:32am until October 17, 09:00am
Click here for hazard details and duration
...
  •  
    Frost Advisory October 17, 07:32am until October 17, 09:00am

    NOW until 9:00am Sat

    Frost Advisory

  • Today

    High: 61 °F

    Areas Frost
    then Sunny

  • Tonight

    Tonight: Areas of frost after 5am. Otherwise, clear, with a low around 35. Calm wind becoming southeast around 5 mph after midnight.

    Low: 35 °F

    Clear then
    Areas Frost

  • Sunday

    Sunday: Areas of frost before 8am. Otherwise, sunny, with a high near 66. South wind 5 to 8 mph.

    High: 66 °F

    Areas Frost
    then Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 36. Light southeast wind.

    Low: 36 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 71. Light south wind.

    High: 71 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 40.

    Low: 40 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

Detailed Forecast

Today
Areas of frost before 8am. Otherwise, sunny, with a high near 61. North wind around 6 mph becoming calm in the morning.
Tonight
Areas of frost after 5am. Otherwise, clear, with a low around 35. Calm wind becoming southeast around 5 mph after midnight.
Sunday
Areas of frost before 8am. Otherwise, sunny, with a high near 66. South wind 5 to 8 mph.
Sunday Night
Clear, with a low around 36. Light southeast wind.
Monday
Sunny, with a high near 71. Light south wind.
Monday Night
Partly cloudy, with a low around 40.
Tuesday
Sunny, with a high near 75.
Tuesday Night
Mostly clear, with a low around 43.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Mostly clear, with a low around 45.
Thursday
Sunny, with a high near 82.
Thursday Night
Mostly clear, with a low around 49.
Friday
Sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Piasa IL
 39.1°N 90.15°W (Elev. 584 ft)
Last Update:
6:26 am CDT Oct 17, 2026
Forecast Valid:
7am CDT Oct 17, 2026-6pm CDT Oct 23, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation