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Heavy Snow in the Sierra Nevada; Heavy Rainfall in Texas Sunday

Heavy snow is expected in the Sierra Nevada mountain ranges into Saturday causing hazardous travel conditions. Winter Storm Warnings have been issued. Thunderstorms and moderate to heavy rainfall are expected across portions of eastern Texas into Louisiana on Sunday. Read More >

Hazardous Weather Conditions

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Mostly Cloudy

79°F

26°C

Humidity 74%
Wind Speed W 6 mph
Barometer 29.77 in (1008.1 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 13 Nov 3:53 pm EST
Extended Forecast for

Marathon FL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 81. Northwest wind around 10 mph.

    High: 81 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 67. Northwest wind around 15 mph.

    Low: 67 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 75. North wind around 15 mph.

    High: 75 °F

    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 67. North wind around 15 mph.

    Low: 67 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly sunny, with a high near 80. Northeast wind around 15 mph.

    High: 80 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 73.

    Low: 73 °F

    Partly Cloudy

  • Monday

    Monday: A slight chance of showers. Mostly sunny, with a high near 81. Windy. Chance of precipitation is 10%.

    High: 81 °F

    Slight Chance
    Showers and
    Windy

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 74. Windy. Chance of precipitation is 30%.

    Low: 74 °F

    Chance
    Showers and
    Windy

  • Tuesday

    Tuesday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 81. Windy. Chance of precipitation is 50%.

    High: 81 °F

    Chance
    Showers and
    Windy

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 81. Northwest wind around 10 mph.
Tonight
Partly cloudy, with a low around 67. Northwest wind around 15 mph.
Saturday
Sunny, with a high near 75. North wind around 15 mph.
Saturday Night
Increasing clouds, with a low around 67. North wind around 15 mph.
Sunday
Mostly sunny, with a high near 80. Northeast wind around 15 mph.
Sunday Night
Partly cloudy, with a low around 73.
Monday
A slight chance of showers. Mostly sunny, with a high near 81. Windy. Chance of precipitation is 10%.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 74. Windy. Chance of precipitation is 30%.
Tuesday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 81. Windy. Chance of precipitation is 50%.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 74. Windy. Chance of precipitation is 40%.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 82. Windy. Chance of precipitation is 50%.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 74. Windy. Chance of precipitation is 40%.
Thursday
A chance of showers. Mostly sunny, with a high near 82. Windy. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marathon FL
 24.7°N 81.07°W (Elev. 0 ft)
Last Update:
4:15 pm EST Nov 13, 2026
Forecast Valid:
4pm EST Nov 13, 2026-6pm EST Nov 19, 2026
 
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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