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.

Partly Cloudy and Breezy

39°F

4°C

Humidity 75%
Wind Speed N 25 G 31 mph
Barometer 30.21 in
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill28°F (-2°C)
Last update 27 Mar 6:50 am CDT
Extended Forecast for

Marine IL

  • Today

    Today: A 30 percent chance of showers, mainly before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 51. Breezy, with a north wind 18 to 20 mph, with gusts as high as 28 mph.

    High: 51 °F

    Breezy.
    Chance
    Showers then
    Partly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 30. North wind 6 to 14 mph.

    Low: 30 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 54. Calm wind becoming south 5 to 9 mph in the morning.

    High: 54 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 39. South wind around 8 mph.

    Low: 39 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 66. South wind 7 to 14 mph, with gusts as high as 21 mph.

    High: 66 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of rain and thunderstorms after 1am. Mostly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: A 20 percent chance of rain. Partly sunny, with a high near 83. Breezy.

    High: 83 °F

    Slight Chance
    Rain and
    Breezy

Detailed Forecast

Today
A 30 percent chance of showers, mainly before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 51. Breezy, with a north wind 18 to 20 mph, with gusts as high as 28 mph.
Tonight
Mostly clear, with a low around 30. North wind 6 to 14 mph.
Saturday
Sunny, with a high near 54. Calm wind becoming south 5 to 9 mph in the morning.
Saturday Night
Partly cloudy, with a low around 39. South wind around 8 mph.
Sunday
Partly sunny, with a high near 66. South wind 7 to 14 mph, with gusts as high as 21 mph.
Sunday Night
Partly cloudy, with a low around 55.
Monday
Mostly sunny, with a high near 81.
Monday Night
A 20 percent chance of rain and thunderstorms after 1am. Mostly cloudy, with a low around 63.
Tuesday
A 20 percent chance of rain. Partly sunny, with a high near 83. Breezy.
Tuesday Night
A 50 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 61.
Wednesday
A 50 percent chance of rain and thunderstorms. Partly sunny, with a high near 74.
Wednesday Night
Rain and thunderstorms likely. Mostly cloudy, with a low around 55. Chance of precipitation is 70%.
Thursday
Rain and thunderstorms likely. Mostly cloudy, with a high near 67. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marine IL
 38.78°N 89.77°W (Elev. 512 ft)
Last Update:
5:41 am CDT Mar 27, 2026
Forecast Valid:
7am CDT Mar 27, 2026-6pm CDT Apr 2, 2026
 
Forecast Discussion
 
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Additional Resources

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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