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.

Partly Cloudy

60°F

16°C

Humidity 52%
Wind Speed SE 8 mph
Barometer 29.91 in
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 15 May 5:55 am CDT
Extended Forecast for

3 Miles NNW Pontoon Beach IL

  • Today

    Today: A 50 percent chance of showers and thunderstorms, mainly before 9am. Partly sunny, with a high near 84. South wind 11 to 15 mph, with gusts as high as 22 mph.

    High: 84 °F

    Chance
    T-storms then
    Partly Sunny

  • Tonight

    Tonight: A slight chance of showers, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 66. South wind 9 to 11 mph. Chance of precipitation is 30%.

    Low: 66 °F

    Mostly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: Showers and thunderstorms likely before 3pm, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 84. South wind around 10 mph. Chance of precipitation is 60%.

    High: 84 °F

    Showers
    Likely then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 65. South wind around 9 mph.

    Low: 65 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 90. Breezy, with a south wind 11 to 20 mph, with gusts as high as 28 mph.

    High: 90 °F

    Sunny then
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 91. Breezy.

    High: 91 °F

    Breezy.
    Mostly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.

    Low: 71 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 87. Chance of precipitation is 70%.

    High: 87 °F

    Chance
    T-storms then
    Showers
    Likely

Detailed Forecast

Today
A 50 percent chance of showers and thunderstorms, mainly before 9am. Partly sunny, with a high near 84. South wind 11 to 15 mph, with gusts as high as 22 mph.
Tonight
A slight chance of showers, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 66. South wind 9 to 11 mph. Chance of precipitation is 30%.
Saturday
Showers and thunderstorms likely before 3pm, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 84. South wind around 10 mph. Chance of precipitation is 60%.
Saturday Night
Partly cloudy, with a low around 65. South wind around 9 mph.
Sunday
Sunny, with a high near 90. Breezy, with a south wind 11 to 20 mph, with gusts as high as 28 mph.
Sunday Night
Mostly clear, with a low around 70.
Monday
A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 91. Breezy.
Monday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 87. Chance of precipitation is 70%.
Tuesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 61. Chance of precipitation is 60%.
Wednesday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 76.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 56.
Thursday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 76.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Pontoon Beach IL
 38.77°N 90.08°W (Elev. 427 ft)
Last Update:
5:30 am CDT May 15, 2026
Forecast Valid:
6am CDT May 15, 2026-6pm CDT May 21, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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