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.

Mostly Cloudy

43°F

6°C

Humidity 81%
Wind Speed W 6 mph
Barometer 30.08 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 7 Mar 11:55 pm CDT
Extended Forecast for

Pierron IL

  • Tonight

    Tonight: Partly cloudy, with a low around 35. West wind around 6 mph becoming calm after midnight.

    Low: 35 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 64. Light west wind becoming southwest 5 to 10 mph in the morning.

    High: 64 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 42. Southwest wind 6 to 8 mph.

    Low: 42 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 74. South wind 7 to 17 mph.

    High: 74 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 59. South wind 8 to 13 mph, with gusts as high as 21 mph.

    Low: 59 °F

    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms before 9am, then a slight chance of showers between 9am and noon, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 78. Breezy. Chance of precipitation is 50%.

    High: 78 °F

    Slight Chance
    T-storms then
    Chance
    T-storms and
    Breezy

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 55. Breezy. Chance of precipitation is 90%.

    Low: 55 °F

    Showers and
    Breezy

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before noon, then showers likely. High near 66. Breezy. Chance of precipitation is 100%.

    High: 66 °F

    Breezy.
    Showers then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers before midnight. Partly cloudy, with a low around 31.

    Low: 31 °F

    Chance
    Showers then
    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 35. West wind around 6 mph becoming calm after midnight.
Sunday
Sunny, with a high near 64. Light west wind becoming southwest 5 to 10 mph in the morning.
Sunday Night
Clear, with a low around 42. Southwest wind 6 to 8 mph.
Monday
Sunny, with a high near 74. South wind 7 to 17 mph.
Monday Night
Mostly clear, with a low around 59. South wind 8 to 13 mph, with gusts as high as 21 mph.
Tuesday
A slight chance of showers and thunderstorms before 9am, then a slight chance of showers between 9am and noon, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 78. Breezy. Chance of precipitation is 50%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 55. Breezy. Chance of precipitation is 90%.
Wednesday
Showers and possibly a thunderstorm before noon, then showers likely. High near 66. Breezy. Chance of precipitation is 100%.
Wednesday Night
A 30 percent chance of showers before midnight. Partly cloudy, with a low around 31.
Thursday
Sunny, with a high near 51.
Thursday Night
Mostly cloudy, with a low around 40.
Friday
Mostly cloudy, with a high near 65. Breezy.
Friday Night
Mostly cloudy, with a low around 37.
Saturday
Mostly cloudy, with a high near 55.
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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:
9:21 pm CST Mar 7, 2026
Forecast Valid:
11pm CST Mar 7, 2026-6pm CDT Mar 14, 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