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

36°F

2°C

Humidity 81%
Wind Speed E 7 mph
Barometer 29.92 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 6 Dec 6:50 pm CST
Extended Forecast for

Pontoon Beach IL

  • Tonight

    Tonight: Cloudy, with a low around 33. South wind 3 to 8 mph.

    Low: 33 °F

    Cloudy

  • Sunday

    Sunday: A slight chance of drizzle before 4pm. Cloudy, with a high near 38. Light and variable wind becoming north 9 to 14 mph in the morning. Winds could gust as high as 22 mph.

    High: 38 °F

    Slight Chance
    Drizzle

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 19. North wind 7 to 13 mph, with gusts as high as 22 mph.

    Low: 19 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 33. North wind around 6 mph becoming calm in the morning.

    High: 33 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a low around 25. Light southeast wind becoming south 5 to 9 mph in the evening.

    Low: 25 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 51.

    High: 51 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 48.

    High: 48 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of rain and snow before midnight, then a slight chance of snow. Mostly cloudy, with a low around 27. Chance of precipitation is 20%.

    Low: 27 °F

    Slight Chance
    Rain/Snow
    then Slight
    Chance Snow

Detailed Forecast

Tonight
Cloudy, with a low around 33. South wind 3 to 8 mph.
Sunday
A slight chance of drizzle before 4pm. Cloudy, with a high near 38. Light and variable wind becoming north 9 to 14 mph in the morning. Winds could gust as high as 22 mph.
Sunday Night
Mostly cloudy, with a low around 19. North wind 7 to 13 mph, with gusts as high as 22 mph.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 33. North wind around 6 mph becoming calm in the morning.
Monday Night
Partly cloudy, with a low around 25. Light southeast wind becoming south 5 to 9 mph in the evening.
Tuesday
Mostly sunny, with a high near 51.
Tuesday Night
Mostly cloudy, with a low around 40.
Wednesday
Partly sunny, with a high near 48.
Wednesday Night
A slight chance of rain and snow before midnight, then a slight chance of snow. Mostly cloudy, with a low around 27. Chance of precipitation is 20%.
Thursday
A 20 percent chance of snow before noon. Mostly cloudy, with a high near 38.
Thursday Night
Mostly cloudy, with a low around 19.
Friday
Partly sunny, with a high near 28.
Friday Night
Partly cloudy, with a low around 9.
Saturday
Mostly sunny, with a high near 23.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Pontoon Beach IL
 38.73°N 90.06°W (Elev. 423 ft)
Last Update:
4:56 pm CST Dec 6, 2025
Forecast Valid:
7pm CST Dec 6, 2025-6pm CST Dec 13, 2025
 
Forecast Discussion
 
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Additional Resources

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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