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.

Overcast

75°F

24°C

Humidity 89%
Wind Speed SE 7 mph
Barometer 29.92 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 26 Jun 6:50 pm CDT
Extended Forecast for

3 Miles NW Pontoon Beach IL

Flood Watch June 26, 06:53pm until June 26, 10:00pm
Click here for hazard details and duration
...
  •  
    Flood Watch June 26, 06:53pm until June 26, 10:00pm

    NOW until 10:00pm Fri

    Flood Watch

  • Tonight

    Low: 68 °F

    T-storms
    Likely then
    Chance
    T-storms

  • Saturday

    Saturday: A slight chance of showers and thunderstorms before noon, then a slight chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 84. Light and variable wind becoming southwest 5 to 7 mph in the morning. Chance of precipitation is 20%.

    High: 84 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms, mainly between midnight and 4am. Mostly cloudy, with a low around 72. Southeast wind 5 to 7 mph.

    Low: 72 °F

    Chance
    T-storms

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 93. Heat index values as high as 109. South wind 7 to 13 mph.

    High: 93 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 76. South wind 5 to 10 mph.

    Low: 76 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 77.

    Low: 77 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

Detailed Forecast

Tonight
Showers and thunderstorms likely before 4am, then a slight chance of showers. Mostly cloudy, with a low around 68. South wind 5 to 7 mph becoming light and variable in the evening. Chance of precipitation is 60%.
Saturday
A slight chance of showers and thunderstorms before noon, then a slight chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 84. Light and variable wind becoming southwest 5 to 7 mph in the morning. Chance of precipitation is 20%.
Saturday Night
A 30 percent chance of showers and thunderstorms, mainly between midnight and 4am. Mostly cloudy, with a low around 72. Southeast wind 5 to 7 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 93. Heat index values as high as 109. South wind 7 to 13 mph.
Sunday Night
Mostly clear, with a low around 76. South wind 5 to 10 mph.
Monday
Sunny, with a high near 96.
Monday Night
Mostly clear, with a low around 77.
Tuesday
Sunny and hot, with a high near 97.
Tuesday Night
Clear, with a low around 77.
Wednesday
Sunny, with a high near 96.
Wednesday Night
Mostly clear, with a low around 78.
Thursday
Sunny and hot, with a high near 97.
Thursday Night
Mostly clear, with a low around 77.
Friday
A 40 percent chance of showers and thunderstorms. Sunny, with a high near 96.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NW Pontoon Beach IL
 38.77°N 90.08°W (Elev. 427 ft)
Last Update:
5:41 pm CDT Jun 26, 2026
Forecast Valid:
6pm CDT Jun 26, 2026-6pm CDT Jul 3, 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