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

56°F

13°C

Humidity 32%
Wind Speed N 3 mph
Barometer 29.97 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 27 Feb 11:35 pm CST
Extended Forecast for

Pierron IL

  • Tonight

    Tonight: Mostly clear, with a low around 37. West wind 6 to 8 mph becoming north after midnight.

    Low: 37 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of rain after 1pm. Increasing clouds, with a high near 62. Northeast wind 5 to 9 mph becoming south in the afternoon.

    High: 62 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Saturday Night

    Saturday Night: A 20 percent chance of rain between 9pm and 10pm. Partly cloudy, with a low around 29. Southeast wind 5 to 11 mph becoming north in the evening. Winds could gust as high as 20 mph.

    Low: 29 °F

    Slight Chance
    Rain then
    Partly Cloudy

  • Sunday

    Sunday: Increasing clouds, with a high near 45. Northeast wind 10 to 13 mph.

    High: 45 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Rain and snow likely. Cloudy, with a low around 31. East wind around 10 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 31 °F

    Rain/Snow
    Likely

  • Monday

    Monday: A chance of rain and snow before noon, then a slight chance of rain. Mostly cloudy, with a high near 43. Chance of precipitation is 40%.

    High: 43 °F

    Chance
    Rain/Snow
    then Slight
    Chance Rain

  • Monday Night

    Monday Night: Rain likely, mainly after midnight. Cloudy, with a low around 37. Chance of precipitation is 60%.

    Low: 37 °F

    Rain Likely

  • Tuesday

    Tuesday: Rain and possibly a thunderstorm. High near 57. Chance of precipitation is 80%.

    High: 57 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain, with thunderstorms also possible after midnight. Low around 47. Chance of precipitation is 80%.

    Low: 47 °F

    Rain

Detailed Forecast

Tonight
Mostly clear, with a low around 37. West wind 6 to 8 mph becoming north after midnight.
Saturday
A 20 percent chance of rain after 1pm. Increasing clouds, with a high near 62. Northeast wind 5 to 9 mph becoming south in the afternoon.
Saturday Night
A 20 percent chance of rain between 9pm and 10pm. Partly cloudy, with a low around 29. Southeast wind 5 to 11 mph becoming north in the evening. Winds could gust as high as 20 mph.
Sunday
Increasing clouds, with a high near 45. Northeast wind 10 to 13 mph.
Sunday Night
Rain and snow likely. Cloudy, with a low around 31. East wind around 10 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Monday
A chance of rain and snow before noon, then a slight chance of rain. Mostly cloudy, with a high near 43. Chance of precipitation is 40%.
Monday Night
Rain likely, mainly after midnight. Cloudy, with a low around 37. Chance of precipitation is 60%.
Tuesday
Rain and possibly a thunderstorm. High near 57. Chance of precipitation is 80%.
Tuesday Night
Rain, with thunderstorms also possible after midnight. Low around 47. Chance of precipitation is 80%.
Wednesday
Rain likely and possibly a thunderstorm. Cloudy, with a high near 62. Chance of precipitation is 70%.
Wednesday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 50. Chance of precipitation is 70%.
Thursday
Rain likely. Mostly cloudy, with a high near 65. Chance of precipitation is 70%.
Thursday Night
A 50 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 52.
Friday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 70. Chance of precipitation is 60%.
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ABOUT THIS FORECAST

 
Point Forecast:
Pierron IL
 38.78°N 89.57°W (Elev. 512 ft)
Last Update:
10:31 pm CST Feb 27, 2026
Forecast Valid:
11pm CST Feb 27, 2026-6pm CST Mar 6, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation