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

28°F

-2°C

Humidity 43%
Wind Speed S 7 mph
Barometer 29.85 in
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 15 Jan 7:45 pm CST
Extended Forecast for

Pierron IL

  • Tonight

    Tonight: Snow likely, mainly before 1am. Mostly cloudy, with a temperature rising to around 32 by 4am. South wind 7 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 24 °F⇑

    Snow Likely

  • Friday

    Friday: A chance of sprinkles between 3pm and 4pm, then a slight chance of snow after 4pm. Mostly cloudy, with a high near 44. West wind 10 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.

    High: 44 °F

    Mostly Cloudy
    then Slight
    Chance
    Sprinkles/Snow

  • Friday Night

    Friday Night: A 40 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 21. West wind 11 to 15 mph, with gusts as high as 22 mph.

    Low: 21 °F

    Chance Snow

  • Saturday

    Saturday: Partly sunny, with a high near 26. West wind 13 to 17 mph, with gusts as high as 24 mph.

    High: 26 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 10. Northwest wind 6 to 10 mph.

    Low: 10 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 28.

    High: 28 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 13.

    Low: 13 °F

    Partly Cloudy

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 21.

    High: 21 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 8.

    Low: 8 °F

    Mostly Clear

Detailed Forecast

Tonight
Snow likely, mainly before 1am. Mostly cloudy, with a temperature rising to around 32 by 4am. South wind 7 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. Total nighttime snow accumulation of less than a half inch possible.
Friday
A chance of sprinkles between 3pm and 4pm, then a slight chance of snow after 4pm. Mostly cloudy, with a high near 44. West wind 10 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.
Friday Night
A 40 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 21. West wind 11 to 15 mph, with gusts as high as 22 mph.
Saturday
Partly sunny, with a high near 26. West wind 13 to 17 mph, with gusts as high as 24 mph.
Saturday Night
Mostly clear, with a low around 10. Northwest wind 6 to 10 mph.
Sunday
Mostly sunny, with a high near 28.
Sunday Night
Partly cloudy, with a low around 13.
M.L.King Day
Sunny, with a high near 21.
Monday Night
Mostly clear, with a low around 8.
Tuesday
Sunny, with a high near 33.
Tuesday Night
Partly cloudy, with a low around 22.
Wednesday
Mostly sunny, with a high near 43.
Wednesday Night
Partly cloudy, with a low around 20.
Thursday
Mostly sunny, with a high near 40.
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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:
7:47 pm CST Jan 15, 2026
Forecast Valid:
8pm CST Jan 15, 2026-6pm CST Jan 22, 2026
 
Forecast Discussion
 
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Additional Resources

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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