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

Above Average Temperatures in the West; Winter Weather Returns to the Upper Midwest and Great Lakes

Well above average temperatures will continue across the West this week, potentially breaking some daily high temperature records. A storm system dropping south out of Canada will bring a wintry mix to the Upper Midwest and Great Lakes Tuesday, pushing into the Central Appalachians and interior Northeast on Wednesday. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Overcast

73°F

23°C

Humidity 79%
Wind Speed E 9 mph
Barometer 30.13 in (1020.2 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 12 Jan 8:53 pm EST
Extended Forecast for

Marathon FL

  • Tonight

    Tonight: A chance of showers. Partly cloudy, with a low around 69. Northeast wind around 10 mph. Chance of precipitation is 30%.

    Low: 69 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers. Sunny, with a high near 78. East wind around 10 mph. Chance of precipitation is 30%.

    High: 78 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of showers. Mostly clear, with a low around 70. East wind 5 to 10 mph becoming southeast after midnight. Chance of precipitation is 20%.

    Low: 70 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers and thunderstorms. Mostly sunny, with a high near 77. Calm wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 30%.

    High: 77 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 67. West wind 5 to 10 mph. Chance of precipitation is 40%.

    Low: 67 °F

    Chance
    Showers

  • Thursday

    Thursday: A chance of showers. Mostly sunny, with a high near 75. Chance of precipitation is 40%.

    High: 75 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A slight chance of showers. Partly cloudy, with a low around 54. Breezy. Chance of precipitation is 10%.

    Low: 54 °F

    Slight Chance
    Showers and
    Breezy

  • Friday

    Friday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

Detailed Forecast

Tonight
A chance of showers. Partly cloudy, with a low around 69. Northeast wind around 10 mph. Chance of precipitation is 30%.
Tuesday
A chance of showers. Sunny, with a high near 78. East wind around 10 mph. Chance of precipitation is 30%.
Tuesday Night
A slight chance of showers. Mostly clear, with a low around 70. East wind 5 to 10 mph becoming southeast after midnight. Chance of precipitation is 20%.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 77. Calm wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 67. West wind 5 to 10 mph. Chance of precipitation is 40%.
Thursday
A chance of showers. Mostly sunny, with a high near 75. Chance of precipitation is 40%.
Thursday Night
A slight chance of showers. Partly cloudy, with a low around 54. Breezy. Chance of precipitation is 10%.
Friday
Sunny, with a high near 67.
Friday Night
Mostly clear, with a low around 58.
Saturday
Mostly sunny, with a high near 71.
Saturday Night
A slight chance of showers. Partly cloudy, with a low around 62. Chance of precipitation is 10%.
Sunday
A slight chance of showers. Mostly sunny, with a high near 71. Chance of precipitation is 10%.
Sunday Night
Mostly clear, with a low around 57.
M.L.King Day
Mostly sunny, with a high near 70.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marathon FL
 24.72°N 81.07°W (Elev. 7 ft)
Last Update:
9:15 pm EST Jan 12, 2026
Forecast Valid:
9pm EST Jan 12, 2026-6pm EST Jan 19, 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