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.

Fair

71°F

22°C

Humidity 88%
Wind Speed W 6 mph
Barometer 29.66 in
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 18 Jun 3:15 am CDT
Extended Forecast for

Marine IL

  • Overnight

    Overnight: Mostly clear, with a low around 68. West wind around 6 mph.

    Low: 68 °F

    Mostly Clear

  • Thursday

    Thursday: A 30 percent chance of showers, mainly between noon and 3pm. Partly sunny, with a high near 77. Northwest wind 5 to 10 mph.

    High: 77 °F

    Mostly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 59. Northwest wind around 6 mph becoming calm in the evening.

    Low: 59 °F

    Mostly Clear

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 83. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 83 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 64. Calm wind.

    Low: 64 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 66.

    Low: 66 °F

    Partly Cloudy
    then Chance
    T-storms

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 82. Chance of precipitation is 90%.

    High: 82 °F

    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 63. Chance of precipitation is 80%.

    Low: 63 °F

    Showers

Detailed Forecast

Overnight
Mostly clear, with a low around 68. West wind around 6 mph.
Thursday
A 30 percent chance of showers, mainly between noon and 3pm. Partly sunny, with a high near 77. Northwest wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 59. Northwest wind around 6 mph becoming calm in the evening.
Juneteenth
Mostly sunny, with a high near 83. Calm wind becoming northwest around 5 mph in the afternoon.
Friday Night
Mostly cloudy, with a low around 64. Calm wind.
Saturday
Mostly sunny, with a high near 85.
Saturday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 66.
Sunday
Showers and possibly a thunderstorm. High near 82. Chance of precipitation is 90%.
Sunday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 63. Chance of precipitation is 80%.
Monday
A 20 percent chance of showers before 1pm. Partly sunny, with a high near 77.
Monday Night
Partly cloudy, with a low around 59.
Tuesday
Mostly sunny, with a high near 79.
Tuesday Night
Mostly clear, with a low around 61.
Wednesday
Mostly sunny, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marine IL
 38.78°N 89.8°W (Elev. 518 ft)
Last Update:
1:26 am CDT Jun 18, 2026
Forecast Valid:
3am CDT Jun 18, 2026-6pm CDT Jun 24, 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