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

Hazardous Weather Conditions

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

91°F

33°C

Humidity 64%
Wind Speed Vrbl 6 mph
Barometer 30.10 in (1019.4 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index105°F (41°C)
Last update 13 Jul 12:53 pm EDT
Extended Forecast for

Marathon FL

  • This Afternoon

    This Afternoon: A chance of showers and thunderstorms. Mostly sunny, with a high near 89. Calm wind. Chance of precipitation is 40%.

    High: 89 °F

    Chance
    Showers

  • Tonight

    Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 79. Calm wind becoming north around 5 mph. Chance of precipitation is 50%.

    Low: 79 °F

    Chance
    Showers

  • Monday

    Monday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 88. South wind around 5 mph becoming west in the afternoon. Chance of precipitation is 60%.

    High: 88 °F

    Showers
    Likely

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 78. North wind around 5 mph becoming south after midnight. Chance of precipitation is 70%.

    Low: 78 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 87. South wind around 5 mph. Chance of precipitation is 60%.

    High: 87 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 79. Chance of precipitation is 50%.

    Low: 79 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms. Partly sunny, with a high near 88. Chance of precipitation is 50%.

    High: 88 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 81. Chance of precipitation is 40%.

    Low: 81 °F

    Chance
    Showers

  • Thursday

    Thursday: A chance of showers and thunderstorms. Partly sunny, with a high near 89. Chance of precipitation is 30%.

    High: 89 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms. Mostly sunny, with a high near 89. Calm wind. Chance of precipitation is 40%.
Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 79. Calm wind becoming north around 5 mph. Chance of precipitation is 50%.
Monday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 88. South wind around 5 mph becoming west in the afternoon. Chance of precipitation is 60%.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 78. North wind around 5 mph becoming south after midnight. Chance of precipitation is 70%.
Tuesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 87. South wind around 5 mph. Chance of precipitation is 60%.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 79. Chance of precipitation is 50%.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 88. Chance of precipitation is 50%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 81. Chance of precipitation is 40%.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 89. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 82. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 82. Chance of precipitation is 30%.
Saturday
A chance of showers and thunderstorms. Sunny, with a high near 89. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marathon FL
 24.72°N 81.07°W (Elev. 7 ft)
Last Update:
1:15 pm EDT Jul 13, 2025
Forecast Valid:
1pm EDT Jul 13, 2025-6pm EDT Jul 19, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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