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

6°C

43°F

Humidity 66%
Wind Speed N 24 G 35 km/h
Barometer 30.23 in
Dewpoint 0°C (32°F)
Visibility 16 km
Wind Chill2°C (36°F)
Last update 11 Mar 8:45 pm CDT
Extended Forecast for

Pontoon Beach IL

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 0. Northwest wind 22 to 27 km/h decreasing to 10 to 15 km/h after midnight. Winds could gust as high as 42 km/h.

    Low: 0 °C

    Decreasing
    Clouds

  • Thursday

    Thursday: Sunny, with a high near 13. Light west wind becoming southwest 11 to 16 km/h in the morning.

    High: 13 °C

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 7. South wind 18 to 23 km/h increasing to 24 to 29 km/h after midnight. Winds could gust as high as 50 km/h.

    Low: 7 °C

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 16. Northwest wind 21 to 24 km/h, with gusts as high as 39 km/h.

    High: 16 °C

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 2. Northwest wind 8 to 11 km/h becoming northeast after midnight.

    Low: 2 °C

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 17.

    High: 17 °C

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 10.

    Low: 10 °C

    Mostly Cloudy

  • Sunday

    Sunday: Rain likely and possibly a thunderstorm, then rain after 1pm. High near 19. Breezy. Chance of precipitation is 80%.

    High: 19 °C

    Rain and
    Breezy

  • Sunday Night

    Sunday Night: A chance of rain and snow before 1am. Mostly cloudy, with a low around -4. Blustery. Chance of precipitation is 30%.

    Low: -4 °C

    Chance
    Rain/Snow and
    Blustery

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming clear, with a low around 0. Northwest wind 22 to 27 km/h decreasing to 10 to 15 km/h after midnight. Winds could gust as high as 42 km/h.
Thursday
Sunny, with a high near 13. Light west wind becoming southwest 11 to 16 km/h in the morning.
Thursday Night
Partly cloudy, with a low around 7. South wind 18 to 23 km/h increasing to 24 to 29 km/h after midnight. Winds could gust as high as 50 km/h.
Friday
Partly sunny, with a high near 16. Northwest wind 21 to 24 km/h, with gusts as high as 39 km/h.
Friday Night
Mostly cloudy, with a low around 2. Northwest wind 8 to 11 km/h becoming northeast after midnight.
Saturday
Partly sunny, with a high near 17.
Saturday Night
Mostly cloudy, with a low around 10.
Sunday
Rain likely and possibly a thunderstorm, then rain after 1pm. High near 19. Breezy. Chance of precipitation is 80%.
Sunday Night
A chance of rain and snow before 1am. Mostly cloudy, with a low around -4. Blustery. Chance of precipitation is 30%.
Monday
Partly sunny, with a high near 2. Breezy.
Monday Night
Mostly clear, with a low around -8.
Tuesday
Mostly sunny, with a high near 6.
Tuesday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 1. Chance of precipitation is 20%.
Wednesday
Partly sunny, with a high near 13.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Pontoon Beach IL
 38.73°N 90.06°W (Elev. 423 m)
Last Update:
5:36 pm CDT Mar 11, 2026
Forecast Valid:
9pm CDT Mar 11, 2026-6pm CDT Mar 18, 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