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.

Fog/Mist

46°F

8°C

Humidity 93%
Wind Speed Calm
Barometer 29.96 in
Dewpoint 44°F (7°C)
Visibility 5.00 mi
Last update 26 Dec 10:15 pm CST
Extended Forecast for

Pontoon Beach IL

Dense Fog Advisory December 26, 10:40pm until December 27, 09:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory December 26, 10:40pm until December 27, 09:00am

    NOW until 9:00am Sat

    Dense Fog Advisory

  • Tonight

    Low: 44 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Saturday

    Saturday: Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 63. Southeast wind 5 to 11 mph.

    High: 63 °F

    Areas Fog
    then Mostly
    Cloudy

  • Saturday Night

    Saturday Night: A 20 percent chance of rain after 1am. Cloudy, with a low around 59. South wind 8 to 10 mph.

    Low: 59 °F

    Cloudy then
    Slight Chance
    Rain

  • Sunday

    Sunday: A chance of rain and thunderstorms, then rain and possibly a thunderstorm after noon. High near 73. South wind 8 to 17 mph becoming west in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 90%.

    High: 73 °F

    Chance Rain
    then Rain

  • Sunday Night

    Sunday Night: Rain likely before 9pm. Mostly cloudy, with a low around 21. Blustery, with a northwest wind 17 to 22 mph, with gusts as high as 33 mph. Chance of precipitation is 60%.

    Low: 21 °F

    Blustery.
    Rain Likely
    then Mostly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 27. Blustery.

    High: 27 °F

    Mostly Sunny
    and Blustery

  • Monday Night

    Monday Night: Mostly clear, with a low around 19.

    Low: 19 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 36.

    High: 36 °F

    Sunny

Detailed Forecast

Tonight
Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 44. Light and variable wind.
Saturday
Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 63. Southeast wind 5 to 11 mph.
Saturday Night
A 20 percent chance of rain after 1am. Cloudy, with a low around 59. South wind 8 to 10 mph.
Sunday
A chance of rain and thunderstorms, then rain and possibly a thunderstorm after noon. High near 73. South wind 8 to 17 mph becoming west in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 90%.
Sunday Night
Rain likely before 9pm. Mostly cloudy, with a low around 21. Blustery, with a northwest wind 17 to 22 mph, with gusts as high as 33 mph. Chance of precipitation is 60%.
Monday
Mostly sunny, with a high near 27. Blustery.
Monday Night
Mostly clear, with a low around 19.
Tuesday
Sunny, with a high near 36.
Tuesday Night
Partly cloudy, with a low around 27.
Wednesday
Partly sunny, with a high near 42.
Wednesday Night
Mostly cloudy, with a low around 20.
New Year's Day
Partly sunny, with a high near 30.
Thursday Night
Partly cloudy, with a low around 16.
Friday
Mostly sunny, with a high near 31.
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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:
9:31 pm CST Dec 26, 2025
Forecast Valid:
10pm CST Dec 26, 2025-6pm CST Jan 2, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation