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

57°F

14°C

Humidity 88%
Wind Speed Calm
Barometer 30.03 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 11 Oct 8:50 am CDT
Extended Forecast for

Marine IL

  • Today

    Today: Sunny, with a high near 87. Light and variable wind.

    High: 87 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 63. Calm wind becoming south around 5 mph.

    Low: 63 °F

    Increasing
    Clouds

  • Columbus Day

    Columbus Day: Partly sunny, then gradually becoming sunny, with a high near 93. Southwest wind 5 to 14 mph.

    High: 93 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 68. Southwest wind 7 to 9 mph.

    Low: 68 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 94. West wind 7 to 10 mph.

    High: 94 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 69.

    Low: 69 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 83. Chance of precipitation is 70%.

    High: 83 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 62. Chance of precipitation is 50%.

    Low: 62 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 79. Chance of precipitation is 70%.

    High: 79 °F

    Showers
    Likely

Detailed Forecast

Today
Sunny, with a high near 87. Light and variable wind.
Tonight
Increasing clouds, with a low around 63. Calm wind becoming south around 5 mph.
Columbus Day
Partly sunny, then gradually becoming sunny, with a high near 93. Southwest wind 5 to 14 mph.
Monday Night
Clear, with a low around 68. Southwest wind 7 to 9 mph.
Tuesday
Sunny, with a high near 94. West wind 7 to 10 mph.
Tuesday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 69.
Wednesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 83. Chance of precipitation is 70%.
Wednesday Night
A chance of showers, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 62. Chance of precipitation is 50%.
Thursday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 79. Chance of precipitation is 70%.
Thursday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 53.
Friday
A 20 percent chance of showers. Partly sunny, with a high near 68. Breezy.
Friday Night
Partly cloudy, with a low around 41.
Saturday
Mostly sunny, with a high near 62.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marine IL
 38.78°N 89.77°W (Elev. 512 ft)
Last Update:
5:26 am CDT Oct 11, 2026
Forecast Valid:
8am CDT Oct 11, 2026-6pm CDT Oct 17, 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