Winter Storm in the Central Appalachians through the Northeast; Heavy Snow in the Great Basin and Rockies

A winter storm will impact the central Appalachians to the Northeast through the night. Accumulating snow is expected for interior New England and the northern Mid-Atlantic. Scattered showers and occasional thunderstorms will persist across Florida and the Southeast coast. Locally heavy mountain snow is expected in the Great Basin and Rockies over the next couple of days. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

N/A

Humidity NA
Wind Speed Calm
Barometer 29.99 in (1015.7 mb)
Dewpoint N/A
Visibility 10.00 mi
Last update 3 Dec 5:53 am EST
Extended Forecast for

Marathon FL

  • Today

    Today: Patchy fog before 10am.  Otherwise, mostly sunny, with a high near 78. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 78 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 71. North wind around 5 mph becoming northeast after midnight.

    Low: 71 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 80. East wind around 10 mph.

    High: 80 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 73. East wind around 10 mph.

    Low: 73 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 80. East wind 5 to 10 mph.

    High: 80 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 75.

    Low: 75 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers.  Partly cloudy, with a low around 74. Chance of precipitation is 20%.

    Low: 74 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: A chance of showers.  Mostly sunny, with a high near 81. Chance of precipitation is 30%.

    High: 81 °F

    Chance
    Showers

Detailed Forecast

Today
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 78. Calm wind becoming northwest around 5 mph in the afternoon.
Tonight
Partly cloudy, with a low around 71. North wind around 5 mph becoming northeast after midnight.
Thursday
Mostly sunny, with a high near 80. East wind around 10 mph.
Thursday Night
Partly cloudy, with a low around 73. East wind around 10 mph.
Friday
Mostly sunny, with a high near 80. East wind 5 to 10 mph.
Friday Night
Partly cloudy, with a low around 75.
Saturday
Sunny, with a high near 82.
Saturday Night
A slight chance of showers. Partly cloudy, with a low around 74. Chance of precipitation is 20%.
Sunday
A chance of showers. Mostly sunny, with a high near 81. Chance of precipitation is 30%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 71. Chance of precipitation is 30%.
Monday
A slight chance of showers. Mostly cloudy, with a high near 78. Chance of precipitation is 20%.
Monday Night
A slight chance of showers. Mostly cloudy, with a low around 66. Chance of precipitation is 10%.
Tuesday
A slight chance of showers. Partly sunny, with a high near 76. Chance of precipitation is 10%.
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ABOUT THIS FORECAST

 
Point Forecast:
Marathon FL
 24.72°N 81.07°W (Elev. 7 ft)
5:15 am EST Dec 3, 2025
6am EST Dec 3, 2025-6pm EST Dec 9, 2025
 
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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