National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

46°F

8°C

Humidity 50%
Wind Speed S 16 G 21 mph
Barometer 29.80 in
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 13 Mar 2:55 am CDT
Extended Forecast for

Pontoon Beach IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 45. Southwest wind around 17 mph, with gusts as high as 29 mph.

    Low: 45 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 60. West wind 14 to 18 mph, with gusts as high as 28 mph.

    High: 60 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 37. Northwest wind around 6 mph becoming calm.

    Low: 37 °F

    Mostly Clear

  • Saturday

    Saturday: Partly sunny, with a high near 66. East wind 6 to 14 mph.

    High: 66 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 55. Southeast wind 10 to 14 mph, with gusts as high as 23 mph.

    Low: 55 °F

    Mostly Cloudy

  • Sunday

    Sunday: Rain, with thunderstorms also possible after 4pm. High near 69. Breezy. Chance of precipitation is 90%.

    High: 69 °F

    Breezy.
    Chance Rain
    then Rain

  • Sunday Night

    Sunday Night: Rain before 1am, then snow likely. Some thunder is also possible. Low around 23. Blustery. Chance of precipitation is 90%.

    Low: 23 °F

    Rain and
    Breezy then
    Rain/Snow and
    Blustery

  • Monday

    Monday: A 30 percent chance of snow before 1pm. Mostly cloudy, with a high near 29. Blustery.

    High: 29 °F

    Chance Snow
    and Blustery

  • Monday Night

    Monday Night: Mostly clear, with a low around 14. Blustery.

    Low: 14 °F

    Partly Cloudy
    and Blustery
    then Mostly
    Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 45. Southwest wind around 17 mph, with gusts as high as 29 mph.
Friday
Partly sunny, with a high near 60. West wind 14 to 18 mph, with gusts as high as 28 mph.
Friday Night
Mostly clear, with a low around 37. Northwest wind around 6 mph becoming calm.
Saturday
Partly sunny, with a high near 66. East wind 6 to 14 mph.
Saturday Night
Mostly cloudy, with a low around 55. Southeast wind 10 to 14 mph, with gusts as high as 23 mph.
Sunday
Rain, with thunderstorms also possible after 4pm. High near 69. Breezy. Chance of precipitation is 90%.
Sunday Night
Rain before 1am, then snow likely. Some thunder is also possible. Low around 23. Blustery. Chance of precipitation is 90%.
Monday
A 30 percent chance of snow before 1pm. Mostly cloudy, with a high near 29. Blustery.
Monday Night
Mostly clear, with a low around 14. Blustery.
Tuesday
Mostly sunny, with a high near 36.
Tuesday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 29.
Wednesday
Mostly cloudy, with a high near 60.
Wednesday Night
Partly cloudy, with a low around 40.
Thursday
Sunny, with a high near 70.
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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:
2:46 am CDT Mar 13, 2026
Forecast Valid:
3am CDT Mar 13, 2026-6pm CDT Mar 19, 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