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

24°F

-4°C

Humidity 54%
Wind Speed Calm
Barometer 30.28 in
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Last update 29 Jan 1:35 am CST
Extended Forecast for

Pierron IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 12. Northeast wind 3 to 5 mph.

    Low: 12 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 20 percent chance of snow after 4pm. Mostly cloudy, with a high near 22. Northeast wind 3 to 6 mph.

    High: 22 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Thursday Night

    Thursday Night: A 20 percent chance of snow before 10pm. Mostly cloudy, with a low around 5. North wind around 6 mph.

    Low: 5 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Friday

    Friday: Mostly sunny and cold, with a high near 18. North wind 6 to 10 mph.

    High: 18 °F

    Cold

  • Friday Night

    Friday Night: Partly cloudy, with a low around 3. North wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 3 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny and cold, with a high near 18.

    High: 18 °F

    Cold

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 1.

    Low: 1 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 26.

    High: 26 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 16.

    Low: 16 °F

    Slight Chance
    Snow then
    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 12. Northeast wind 3 to 5 mph.
Thursday
A 20 percent chance of snow after 4pm. Mostly cloudy, with a high near 22. Northeast wind 3 to 6 mph.
Thursday Night
A 20 percent chance of snow before 10pm. Mostly cloudy, with a low around 5. North wind around 6 mph.
Friday
Mostly sunny and cold, with a high near 18. North wind 6 to 10 mph.
Friday Night
Partly cloudy, with a low around 3. North wind 8 to 10 mph, with gusts as high as 20 mph.
Saturday
Mostly sunny and cold, with a high near 18.
Saturday Night
Mostly clear, with a low around 1.
Sunday
Partly sunny, with a high near 26.
Sunday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 16.
Monday
Partly sunny, with a high near 34.
Monday Night
Mostly cloudy, with a low around 19.
Tuesday
Mostly cloudy, with a high near 36.
Tuesday Night
A chance of rain and snow. Mostly cloudy, with a low around 22. Chance of precipitation is 30%.
Wednesday
A 30 percent chance of snow. Mostly cloudy, with a high near 34.
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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:
1:51 am CST Jan 29, 2026
Forecast Valid:
2am CST Jan 29, 2026-6pm CST Feb 4, 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