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

4 Miles NNW Marine IL

Flood Watch June 26, 08:35pm until June 26, 10:00pm
Click here for hazard details and duration
...
  •  
    Flood Watch June 26, 08:35pm until June 26, 10:00pm

    NOW until 10:00pm Fri

    Flood Watch

  • Tonight

    Low: 67 °F

    Chance
    T-storms and
    Patchy Fog

  • Saturday

    Saturday: A slight chance of showers between 9am and 10am. Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 82. Light and variable wind becoming southwest 5 to 7 mph in the morning. Chance of precipitation is 20%.

    High: 82 °F

    Slight Chance
    Showers and
    Patchy Fog
    then Mostly
    Cloudy

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms, mainly between midnight and 5am. Mostly cloudy, with a low around 71. South wind around 6 mph.

    Low: 71 °F

    Chance
    T-storms

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 91. Heat index values as high as 106. South wind 7 to 11 mph.

    High: 91 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 74. South wind 5 to 10 mph.

    Low: 74 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

Detailed Forecast

Tonight
A chance of showers and thunderstorms before 4am, then a slight chance of showers. Patchy fog between 3am and 5am. Otherwise, mostly cloudy, with a low around 67. Southeast wind 3 to 6 mph. Chance of precipitation is 50%.
Saturday
A slight chance of showers between 9am and 10am. Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 82. 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 5am. Mostly cloudy, with a low around 71. South wind around 6 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 91. Heat index values as high as 106. South wind 7 to 11 mph.
Sunday Night
Mostly clear, with a low around 74. South wind 5 to 10 mph.
Monday
Sunny, with a high near 94.
Monday Night
Mostly clear, with a low around 75.
Tuesday
Sunny, with a high near 94.
Tuesday Night
Clear, with a low around 75.
Wednesday
Sunny, with a high near 94.
Wednesday Night
Mostly clear, with a low around 76.
Thursday
Sunny, with a high near 95.
Thursday Night
Mostly clear, with a low around 75.
Friday
A 40 percent chance of showers and thunderstorms. Sunny, with a high near 94.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNW Marine IL
 38.85°N 89.79°W (Elev. 531 ft)
Last Update:
7:11 pm CDT Jun 26, 2026
Forecast Valid:
8pm 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