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.

Partly Cloudy

36°F

2°C

Humidity 94%
Wind Speed Calm
Barometer 30.06 in
Dewpoint 35°F (2°C)
Visibility 7.00 mi
Last update 10 Jan 3:35 am CST
Extended Forecast for

Pierron IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 38. Light north wind.

    Low: 38 °F

    Mostly Cloudy

  • Saturday

    Saturday: A chance of rain between 7am and 10am. Cloudy through mid morning, then gradual clearing, with a high near 46. Light northwest wind increasing to 12 to 17 mph in the morning. Winds could gust as high as 25 mph. Chance of precipitation is 40%.

    High: 46 °F

    Chance Rain
    then Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy during the early evening, then gradual clearing, with a low around 25. West wind 8 to 18 mph, with gusts as high as 28 mph.

    Low: 25 °F

    Gradual
    Clearing

  • Sunday

    Sunday: Sunny, with a high near 37. Northwest wind 13 to 18 mph decreasing to 6 to 11 mph in the afternoon. Winds could gust as high as 26 mph.

    High: 37 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 25. Calm wind becoming southwest 5 to 7 mph after midnight.

    Low: 25 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 50.

    High: 50 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 58.

    High: 58 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 38. Light north wind.
Saturday
A chance of rain between 7am and 10am. Cloudy through mid morning, then gradual clearing, with a high near 46. Light northwest wind increasing to 12 to 17 mph in the morning. Winds could gust as high as 25 mph. Chance of precipitation is 40%.
Saturday Night
Mostly cloudy during the early evening, then gradual clearing, with a low around 25. West wind 8 to 18 mph, with gusts as high as 28 mph.
Sunday
Sunny, with a high near 37. Northwest wind 13 to 18 mph decreasing to 6 to 11 mph in the afternoon. Winds could gust as high as 26 mph.
Sunday Night
Mostly clear, with a low around 25. Calm wind becoming southwest 5 to 7 mph after midnight.
Monday
Mostly sunny, with a high near 50.
Monday Night
Mostly clear, with a low around 35.
Tuesday
Partly sunny, with a high near 58.
Tuesday Night
Mostly cloudy, with a low around 37.
Wednesday
A 20 percent chance of rain after noon. Mostly cloudy, with a high near 43.
Wednesday Night
Partly cloudy, with a low around 21.
Thursday
Mostly sunny, with a high near 36.
Thursday Night
Mostly cloudy, with a low around 27.
Friday
Partly sunny, with a high near 43.
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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:
3:16 am CST Jan 10, 2026
Forecast Valid:
3am CST Jan 10, 2026-6pm CST Jan 16, 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