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

Heavy Snow in the Northwest; Wintry Mix from the Great Lakes to Northeast

Two cold fronts will pass through the Northwest U.S. this week with the main impact being heavy mountain snow across the Cascades, and northern Rockies. A quick moving storm system will bring mixed precipitation including some freezing rain to the Upper Midwest and Great Lakes today then the Northeast U.S. tonight into Wednesday. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

77°F

25°C

Humidity 74%
Wind Speed Vrbl 6 mph
Barometer 30.02 in (1016.4 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 6 Jan 2:53 pm EST
Extended Forecast for

Marathon Shores FL

  • This Afternoon

    This Afternoon: Sunny, with a high near 77. East wind around 5 mph.

    High: 77 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 67. East wind around 5 mph.

    Low: 67 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 76. Northeast wind around 5 mph.

    High: 76 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of showers. Mostly clear, with a low around 69. East wind around 5 mph. Chance of precipitation is 10%.

    Low: 69 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: A slight chance of showers. Sunny, with a high near 77. East wind around 10 mph. Chance of precipitation is 10%.

    High: 77 °F

    Slight Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Friday Night

    Friday Night: A slight chance of showers. Mostly clear, with a low around 71. Chance of precipitation is 10%.

    Low: 71 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers. Sunny, with a high near 77. Chance of precipitation is 10%.

    High: 77 °F

    Slight Chance
    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 77. East wind around 5 mph.
Tonight
Partly cloudy, with a low around 67. East wind around 5 mph.
Wednesday
Mostly sunny, with a high near 76. Northeast wind around 5 mph.
Wednesday Night
A slight chance of showers. Mostly clear, with a low around 69. East wind around 5 mph. Chance of precipitation is 10%.
Thursday
A slight chance of showers. Sunny, with a high near 77. East wind around 10 mph. Chance of precipitation is 10%.
Thursday Night
Mostly clear, with a low around 70.
Friday
Sunny, with a high near 78.
Friday Night
A slight chance of showers. Mostly clear, with a low around 71. Chance of precipitation is 10%.
Saturday
A slight chance of showers. Sunny, with a high near 77. Chance of precipitation is 10%.
Saturday Night
A slight chance of showers. Partly cloudy, with a low around 71. Chance of precipitation is 10%.
Sunday
A slight chance of showers. Mostly sunny, with a high near 78. Chance of precipitation is 10%.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 71. Chance of precipitation is 20%.
Monday
A slight chance of showers. Mostly sunny, with a high near 75. Chance of precipitation is 20%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marathon Shores FL
 24.74°N 81.04°W (Elev. 0 ft)
Last Update:
2:15 pm EST Jan 6, 2026
Forecast Valid:
3pm EST Jan 6, 2026-6pm EST Jan 12, 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