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

87°F

31°C

Humidity 70%
Wind Speed Vrbl 6 mph
Barometer 29.95 in (1014.2 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index98°F (37°C)
Last update 1 Jul 4:53 pm EDT
Extended Forecast for

Marathon FLSimilar City Names

  • This Afternoon

    This Afternoon: A slight chance of showers and thunderstorms. Sunny, with a high near 89. Southwest wind around 5 mph. Chance of precipitation is 20%.

    High: 89 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly after 8pm. Partly cloudy, with a low around 82. Calm wind becoming southeast around 5 mph after midnight. Chance of precipitation is 30%.

    Low: 82 °F

    Chance
    Showers

  • Thursday

    Thursday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 89. South wind around 5 mph. Chance of precipitation is 20%.

    High: 89 °F

    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 83. Southeast wind 5 to 10 mph. Chance of precipitation is 20%.

    Low: 83 °F

    Slight Chance
    T-storms

  • Friday

    Friday: A slight chance of showers and thunderstorms. Sunny, with a high near 90. Southeast wind around 5 mph. Chance of precipitation is 10%.

    High: 90 °F

    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 82. Chance of precipitation is 40%.

    Low: 82 °F

    Chance
    Showers

  • Independence Day

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

    High: 89 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 82. Chance of precipitation is 40%.

    Low: 82 °F

    Chance
    T-storms

  • Sunday

    Sunday: A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 30%.

    High: 88 °F

    Chance
    T-storms

Detailed Forecast

This Afternoon
A slight chance of showers and thunderstorms. Sunny, with a high near 89. Southwest wind around 5 mph. Chance of precipitation is 20%.
Tonight
A chance of showers and thunderstorms, mainly after 8pm. Partly cloudy, with a low around 82. Calm wind becoming southeast around 5 mph after midnight. Chance of precipitation is 30%.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 89. South wind around 5 mph. Chance of precipitation is 20%.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 83. Southeast wind 5 to 10 mph. Chance of precipitation is 20%.
Friday
A slight chance of showers and thunderstorms. Sunny, with a high near 90. Southeast wind around 5 mph. Chance of precipitation is 10%.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 82. Chance of precipitation is 40%.
Independence Day
A chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 82. Chance of precipitation is 40%.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 30%.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 83. Chance of precipitation is 30%.
Monday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 20%.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 83. Chance of precipitation is 20%.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 90. Chance of precipitation is 20%.
Tuesday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 83. Chance of precipitation is 20%.
Wednesday
A slight chance of showers. Sunny, with a high near 90. Chance of precipitation is 10%.
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ABOUT THIS FORECAST

 
Point Forecast:
Marathon FLSimilar City Names
 24.72°N 81.07°W (Elev. 7 ft)
Last Update:
5:15 pm EDT Jul 1, 2026
Forecast Valid:
5pm EDT Jul 1, 2026-6pm EDT Jul 8, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation