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.

Partly Cloudy

57°F

14°C

Humidity 75%
Wind Speed NA
Barometer 29.73 in
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 7 Nov 1:15 am CST
Extended Forecast for

Pontoon Beach IL

  • Overnight

    Overnight: A 20 percent chance of rain before 5am. Cloudy, with a low around 53. South wind 9 to 11 mph, with gusts as high as 20 mph.

    Low: 53 °F

    Slight Chance
    Rain

  • Friday

    Friday: Cloudy through mid morning, then gradual clearing, with a high near 71. West wind 8 to 14 mph.

    High: 71 °F

    Becoming
    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 43. West wind 5 to 7 mph becoming calm in the evening.

    Low: 43 °F

    Increasing
    Clouds

  • Saturday

    Saturday: A 30 percent chance of rain after noon. Partly sunny, with a high near 67. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 67 °F

    Partly Sunny
    then Chance
    Rain

  • Saturday Night

    Saturday Night: A 40 percent chance of rain before midnight. Mostly cloudy, with a low around 35. Northwest wind 10 to 14 mph, with gusts as high as 22 mph.

    Low: 35 °F

    Chance Rain
    then Mostly
    Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 42. Breezy.

    High: 42 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 43.

    High: 43 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 27.

    Low: 27 °F

    Mostly Clear

Detailed Forecast

Overnight
A 20 percent chance of rain before 5am. Cloudy, with a low around 53. South wind 9 to 11 mph, with gusts as high as 20 mph.
Friday
Cloudy through mid morning, then gradual clearing, with a high near 71. West wind 8 to 14 mph.
Friday Night
Increasing clouds, with a low around 43. West wind 5 to 7 mph becoming calm in the evening.
Saturday
A 30 percent chance of rain after noon. Partly sunny, with a high near 67. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Saturday Night
A 40 percent chance of rain before midnight. Mostly cloudy, with a low around 35. Northwest wind 10 to 14 mph, with gusts as high as 22 mph.
Sunday
Mostly sunny, with a high near 42. Breezy.
Sunday Night
Partly cloudy, with a low around 25.
Monday
Sunny, with a high near 43.
Monday Night
Mostly clear, with a low around 27.
Veterans Day
Mostly sunny, with a high near 56.
Tuesday Night
Mostly clear, with a low around 43.
Wednesday
Sunny, with a high near 65.
Wednesday Night
Mostly clear, with a low around 39.
Thursday
Sunny, with a high near 62.
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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:
1:26 am CST Nov 7, 2025
Forecast Valid:
1am CST Nov 7, 2025-6pm CST Nov 13, 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