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 60%
Wind Speed SW 13 mph
Barometer 29.89 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 5 Dec 8:50 pm CST
Extended Forecast for

Pontoon Beach IL

  • Tonight

    Tonight: Cloudy, with a low around 28. Light and variable wind becoming southwest 5 to 7 mph in the evening.

    Low: 28 °F

    Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 39. Light and variable wind becoming southeast 5 to 7 mph in the afternoon.

    High: 39 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of rain, mainly after 1am. Mostly cloudy, with a low around 31. Southeast wind 7 to 9 mph.

    Low: 31 °F

    Chance Rain

  • Sunday

    Sunday: A chance of rain before noon, then a slight chance of rain and snow between noon and 3pm, then a slight chance of snow after 3pm. Mostly cloudy, with a high near 40. South wind 5 to 11 mph becoming north in the afternoon. Chance of precipitation is 30%.

    High: 40 °F

    Chance Rain
    then Slight
    Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 17. North wind 6 to 10 mph.

    Low: 17 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 32.

    High: 32 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 23.

    Low: 23 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 48.

    High: 48 °F

    Mostly Sunny

  • Tuesday Night

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

    Low: 37 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Cloudy, with a low around 28. Light and variable wind becoming southwest 5 to 7 mph in the evening.
Saturday
Partly sunny, with a high near 39. Light and variable wind becoming southeast 5 to 7 mph in the afternoon.
Saturday Night
A 30 percent chance of rain, mainly after 1am. Mostly cloudy, with a low around 31. Southeast wind 7 to 9 mph.
Sunday
A chance of rain before noon, then a slight chance of rain and snow between noon and 3pm, then a slight chance of snow after 3pm. Mostly cloudy, with a high near 40. South wind 5 to 11 mph becoming north in the afternoon. Chance of precipitation is 30%.
Sunday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 17. North wind 6 to 10 mph.
Monday
Mostly sunny, with a high near 32.
Monday Night
Partly cloudy, with a low around 23.
Tuesday
Mostly sunny, with a high near 48.
Tuesday Night
Mostly cloudy, with a low around 37.
Wednesday
A 30 percent chance of rain, mainly after noon. Partly sunny, with a high near 47.
Wednesday Night
Mostly cloudy, with a low around 27.
Thursday
Mostly cloudy, with a high near 41.
Thursday Night
Mostly cloudy, with a low around 22.
Friday
Partly sunny, with a high near 32.
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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:
8:21 pm CST Dec 5, 2025
Forecast Valid:
9pm CST Dec 5, 2025-6pm CST Dec 12, 2025
 
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