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

58°F

14°C

Humidity 76%
Wind Speed S 16 G 25 mph
Barometer 29.63 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 17 Feb 11:15 pm CST
Extended Forecast for

Pierron IL

  • Tonight

    Tonight: A slight chance of rain between 1am and 4am. Cloudy, then gradually becoming partly cloudy, with a steady temperature around 56. Breezy, with a southwest wind 16 to 20 mph, with gusts as high as 33 mph. Chance of precipitation is 20%.

    Low: 56 °F

    Slight Chance
    Rain and
    Breezy

  • Wednesday

    Wednesday: Sunny, with a high near 70. West wind 6 to 15 mph, with gusts as high as 25 mph.

    High: 70 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 50. South wind 3 to 7 mph.

    Low: 50 °F

    Partly Cloudy

  • Thursday

    Thursday: A chance of rain before noon, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 67. South wind 7 to 17 mph. Chance of precipitation is 50%.

    High: 67 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 37. West wind 10 to 16 mph, with gusts as high as 24 mph.

    Low: 37 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 49.

    High: 49 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

  • Saturday

    Saturday: A 40 percent chance of snow, mainly after noon. Partly sunny, with a high near 42.

    High: 42 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A 40 percent chance of snow, mainly before midnight. Partly cloudy, with a low around 26.

    Low: 26 °F

    Chance Snow

Detailed Forecast

Tonight
A slight chance of rain between 1am and 4am. Cloudy, then gradually becoming partly cloudy, with a steady temperature around 56. Breezy, with a southwest wind 16 to 20 mph, with gusts as high as 33 mph. Chance of precipitation is 20%.
Wednesday
Sunny, with a high near 70. West wind 6 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
Partly cloudy, with a low around 50. South wind 3 to 7 mph.
Thursday
A chance of rain before noon, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 67. South wind 7 to 17 mph. Chance of precipitation is 50%.
Thursday Night
Mostly clear, with a low around 37. West wind 10 to 16 mph, with gusts as high as 24 mph.
Friday
Sunny, with a high near 49.
Friday Night
Partly cloudy, with a low around 30.
Saturday
A 40 percent chance of snow, mainly after noon. Partly sunny, with a high near 42.
Saturday Night
A 40 percent chance of snow, mainly before midnight. Partly cloudy, with a low around 26.
Sunday
A 20 percent chance of snow before noon. Mostly sunny, with a high near 36.
Sunday Night
Mostly clear, with a low around 19.
Monday
Sunny, with a high near 37.
Monday Night
Partly cloudy, with a low around 20.
Tuesday
Mostly sunny, with a high near 44.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Pierron IL
 38.78°N 89.57°W (Elev. 512 ft)
Last Update:
9:56 pm CST Feb 17, 2026
Forecast Valid:
11pm CST Feb 17, 2026-6pm CST Feb 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation