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.

Fair

57°F

14°C

Humidity 57%
Wind Speed NW 6 mph
Barometer 29.84 in
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 15 Nov 11:15 pm CST
Extended Forecast for

3 Miles SSW Piasa IL

  • Tonight

    Tonight: Clear, with a low around 40. North wind 8 to 10 mph, with gusts as high as 22 mph.

    Low: 40 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 57. Northwest wind 6 to 9 mph.

    High: 57 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 32. North wind around 5 mph becoming light and variable.

    Low: 32 °F

    Mostly Clear

  • Monday

    Monday: A 20 percent chance of showers after 3pm. Mostly sunny, with a high near 58. Southeast wind 5 to 11 mph.

    High: 58 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: Showers likely, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 45. Southeast wind around 11 mph. Chance of precipitation is 60%.

    Low: 45 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A 20 percent chance of showers. Partly sunny, with a high near 68.

    High: 68 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: A 30 percent chance of rain, mainly after noon. Partly sunny, with a high near 62.

    High: 62 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A 50 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 49.

    Low: 49 °F

    Slight Chance
    Rain then
    Chance Rain

Detailed Forecast

Tonight
Clear, with a low around 40. North wind 8 to 10 mph, with gusts as high as 22 mph.
Sunday
Sunny, with a high near 57. Northwest wind 6 to 9 mph.
Sunday Night
Mostly clear, with a low around 32. North wind around 5 mph becoming light and variable.
Monday
A 20 percent chance of showers after 3pm. Mostly sunny, with a high near 58. Southeast wind 5 to 11 mph.
Monday Night
Showers likely, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 45. Southeast wind around 11 mph. Chance of precipitation is 60%.
Tuesday
A 20 percent chance of showers. Partly sunny, with a high near 68.
Tuesday Night
A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 44.
Wednesday
A 30 percent chance of rain, mainly after noon. Partly sunny, with a high near 62.
Wednesday Night
A 50 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 49.
Thursday
Rain. High near 63. Chance of precipitation is 80%.
Thursday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 50. Chance of precipitation is 70%.
Friday
Rain likely. Mostly cloudy, with a high near 61. Chance of precipitation is 60%.
Friday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 41.
Saturday
A 20 percent chance of rain. Partly sunny, with a high near 54.
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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:
9:26 pm CST Nov 15, 2025
Forecast Valid:
11pm CST Nov 15, 2025-6pm CST Nov 22, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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