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.

Overcast

34°F

1°C

Humidity 87%
Wind Speed W 8 mph
Barometer 29.96 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 6 Dec 6:50 am CST
Extended Forecast for

Pontoon Beach IL

  • Today

    Today: Mostly sunny, with a high near 43. Calm wind becoming southeast 5 to 7 mph in the afternoon.

    High: 43 °F

    Mostly Sunny

  • Tonight

    Tonight: A 20 percent chance of rain after 11pm. Cloudy, with a low around 34. Southeast wind 6 to 8 mph.

    Low: 34 °F

    Slight Chance
    Rain

  • Sunday

    Sunday: A 20 percent chance of rain before noon. Mostly cloudy, with a high near 40. South wind 5 to 14 mph becoming north in the afternoon.

    High: 40 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Sunday Night

    Sunday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 18. North wind 5 to 10 mph.

    Low: 18 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 33. North wind around 5 mph becoming calm in the morning.

    High: 33 °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 50.

    High: 50 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 45.

    High: 45 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 43. Calm wind becoming southeast 5 to 7 mph in the afternoon.
Tonight
A 20 percent chance of rain after 11pm. Cloudy, with a low around 34. Southeast wind 6 to 8 mph.
Sunday
A 20 percent chance of rain before noon. Mostly cloudy, with a high near 40. South wind 5 to 14 mph becoming north in the afternoon.
Sunday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 18. North wind 5 to 10 mph.
Monday
Mostly sunny, with a high near 33. North wind around 5 mph becoming calm in the morning.
Monday Night
Partly cloudy, with a low around 23.
Tuesday
Mostly sunny, with a high near 50.
Tuesday Night
Mostly cloudy, with a low around 38.
Wednesday
Partly sunny, with a high near 45.
Wednesday Night
Mostly cloudy, with a low around 26.
Thursday
A slight chance of rain and snow. Mostly cloudy, with a high near 38. Chance of precipitation is 20%.
Thursday Night
Mostly cloudy, with a low around 21.
Friday
Mostly sunny, with a high near 29.
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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:
6:16 am CST Dec 6, 2025
Forecast Valid:
6am CST Dec 6, 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