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

34°F

1°C

Humidity 42%
Wind Speed S 10 mph
Barometer 30.08 in
Dewpoint 13°F (-11°C)
Visibility 10.00 mi
Wind Chill26°F (-3°C)
Last update 21 Jan 3:55 am CST
Extended Forecast for

Pierron IL

  • Today

    Today: Cloudy through mid morning, then gradual clearing, with a high near 46. West wind 11 to 17 mph, with gusts as high as 29 mph.

    High: 46 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 22. West wind 7 to 14 mph becoming northwest after midnight. Winds could gust as high as 25 mph.

    Low: 22 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, with a high near 37. West wind 3 to 6 mph.

    High: 37 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 8. Light and variable wind becoming north 11 to 16 mph after midnight. Winds could gust as high as 24 mph.

    Low: 8 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy and cold, with a high near 14. North wind 13 to 17 mph, with gusts as high as 24 mph.

    High: 14 °F

    Cold

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 1.

    Low: 1 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 50 percent chance of snow, mainly after noon. Cloudy and cold, with a high near 13.

    High: 13 °F

    Slight Chance
    Snow then
    Chance Snow

  • Saturday Night

    Saturday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 8.

    Low: 8 °F

    Chance Snow

  • Sunday

    Sunday: A 20 percent chance of snow before noon. Partly sunny and cold, with a high near 20.

    High: 20 °F

    Slight Chance
    Snow then
    Partly Sunny

Detailed Forecast

Today
Cloudy through mid morning, then gradual clearing, with a high near 46. West wind 11 to 17 mph, with gusts as high as 29 mph.
Tonight
Mostly clear, with a low around 22. West wind 7 to 14 mph becoming northwest after midnight. Winds could gust as high as 25 mph.
Thursday
Partly sunny, with a high near 37. West wind 3 to 6 mph.
Thursday Night
Mostly cloudy, with a low around 8. Light and variable wind becoming north 11 to 16 mph after midnight. Winds could gust as high as 24 mph.
Friday
Mostly cloudy and cold, with a high near 14. North wind 13 to 17 mph, with gusts as high as 24 mph.
Friday Night
Mostly cloudy, with a low around 1.
Saturday
A 50 percent chance of snow, mainly after noon. Cloudy and cold, with a high near 13.
Saturday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 8.
Sunday
A 20 percent chance of snow before noon. Partly sunny and cold, with a high near 20.
Sunday Night
Partly cloudy, with a low around 4.
Monday
Sunny, with a high near 22.
Monday Night
Mostly clear, with a low around 8.
Tuesday
Mostly sunny, with a high near 33.
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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:
3:16 am CST Jan 21, 2026
Forecast Valid:
4am CST Jan 21, 2026-6pm CST Jan 27, 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