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

48°F

9°C

Humidity 43%
Wind Speed SW 6 mph
Barometer 30.16 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 12 Jan 5:50 pm CST
Extended Forecast for

Pierron IL

  • Tonight

    Tonight: Mostly cloudy during the early evening, then becoming clear, with a low around 34. South wind 6 to 9 mph.

    Low: 34 °F

    Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 60. West wind 9 to 14 mph, with gusts as high as 26 mph.

    High: 60 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 30 percent chance of rain, mainly between 7pm and 9pm. Mostly cloudy, with a low around 36. West wind 8 to 13 mph, with gusts as high as 23 mph.

    Low: 36 °F

    Chance Rain

  • Wednesday

    Wednesday: Mostly cloudy, with a temperature rising to near 41 by 11am, then falling to around 32 during the remainder of the day. Breezy, with a northwest wind 14 to 19 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 32 mph.

    High: 41 °F⇓

    Mostly Cloudy
    and Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 16. North wind 10 to 17 mph, with gusts as high as 25 mph.

    Low: 16 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 30.

    High: 30 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 22.

    Low: 22 °F

    Mostly Cloudy

  • Friday

    Friday: A slight chance of rain and snow after noon. Mostly cloudy, with a high near 42. Breezy. Chance of precipitation is 20%.

    High: 42 °F

    Partly Sunny
    then Slight
    Chance
    Rain/Snow and
    Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 18.

    Low: 18 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy during the early evening, then becoming clear, with a low around 34. South wind 6 to 9 mph.
Tuesday
Increasing clouds, with a high near 60. West wind 9 to 14 mph, with gusts as high as 26 mph.
Tuesday Night
A 30 percent chance of rain, mainly between 7pm and 9pm. Mostly cloudy, with a low around 36. West wind 8 to 13 mph, with gusts as high as 23 mph.
Wednesday
Mostly cloudy, with a temperature rising to near 41 by 11am, then falling to around 32 during the remainder of the day. Breezy, with a northwest wind 14 to 19 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 32 mph.
Wednesday Night
Partly cloudy, with a low around 16. North wind 10 to 17 mph, with gusts as high as 25 mph.
Thursday
Mostly sunny, with a high near 30.
Thursday Night
Mostly cloudy, with a low around 22.
Friday
A slight chance of rain and snow after noon. Mostly cloudy, with a high near 42. Breezy. Chance of precipitation is 20%.
Friday Night
Mostly cloudy, with a low around 18.
Saturday
Mostly cloudy, with a high near 27.
Saturday Night
Partly cloudy, with a low around 8.
Sunday
Mostly sunny, with a high near 24.
Sunday Night
Partly cloudy, with a low around 11.
M.L.King Day
Mostly sunny, with a high near 33.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Pierron IL
 38.78°N 89.57°W (Elev. 512 ft)
Last Update:
4:46 pm CST Jan 12, 2026
Forecast Valid:
6pm CST Jan 12, 2026-6pm CST Jan 19, 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