National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

72°F

22°C

Humidity 76%
Wind Speed N 7 mph
Barometer 30.19 in (1022.1 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 25 Dec 7:53 am EST
Extended Forecast for

Marathon Shores FL

  • Christmas Day

    Christmas Day: A slight chance of showers. Sunny, with a high near 79. Northeast wind 5 to 15 mph. Chance of precipitation is 10%.

    High: 79 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: A slight chance of showers. Mostly clear, with a low around 68. North wind 5 to 10 mph. Chance of precipitation is 10%.

    Low: 68 °F

    Slight Chance
    Showers

  • Friday

    Friday: Sunny, with a high near 79. Northeast wind 5 to 10 mph.

    High: 79 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 67. Calm wind becoming north around 5 mph after midnight.

    Low: 67 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 78. North wind around 5 mph becoming calm in the morning.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 69.

    Low: 69 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

Detailed Forecast

Christmas Day
A slight chance of showers. Sunny, with a high near 79. Northeast wind 5 to 15 mph. Chance of precipitation is 10%.
Tonight
A slight chance of showers. Mostly clear, with a low around 68. North wind 5 to 10 mph. Chance of precipitation is 10%.
Friday
Sunny, with a high near 79. Northeast wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around 67. Calm wind becoming north around 5 mph after midnight.
Saturday
Sunny, with a high near 78. North wind around 5 mph becoming calm in the morning.
Saturday Night
Mostly clear, with a low around 67.
Sunday
Sunny, with a high near 79.
Sunday Night
Mostly clear, with a low around 69.
Monday
Sunny, with a high near 79.
Monday Night
Mostly clear, with a low around 67.
Tuesday
A slight chance of showers. Sunny, with a high near 75. Chance of precipitation is 10%.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 60. Chance of precipitation is 20%.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 72. Chance of precipitation is 10%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marathon Shores FL
 24.72°N 81.05°W (Elev. 0 ft)
Last Update:
8:15 am EST Dec 25, 2025
Forecast Valid:
8am EST Dec 25, 2025-6pm EST Dec 31, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation