Current conditions at
The Florida Keys - Marathon International Airport (KMTH)
Lat: 24.73°NLon: 81.05°WElev: 13ft.
Fair
82°F
28°C
| Humidity | 85% |
| Wind Speed | Vrbl 3 mph |
| Barometer | 29.90 in (1012.4 mb) |
| Dewpoint | 77°F (25°C) |
| Visibility | 10.00 mi |
| Heat Index | 90°F (32°C) |
| Last update | 27 Jul 8:53 pm EDT |
Extended Forecast for
Marathon FL
Tonight

Low: 81 °F
Chance
T-stormsTuesday

High: 91 °F
Chance
T-stormsTuesday Night

Low: 82 °F
Slight Chance
T-stormsWednesday

High: 91 °F
Slight Chance
T-stormsWednesday Night

Low: 83 °F
Slight Chance
T-stormsThursday

High: 92 °F
Slight Chance
T-stormsThursday Night

Low: 84 °F
Partly Cloudy
Friday

High: 90 °F
Mostly Sunny
Friday Night

Low: 84 °F
Partly Cloudy
Detailed Forecast
Tonight
A chance of showers and thunderstorms. Partly cloudy, with a low around 81. West wind around 5 mph. Chance of precipitation is 50%.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 91. Southwest wind 5 to 10 mph. Chance of precipitation is 50%.
Tuesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 82. West wind around 10 mph. Chance of precipitation is 20%.
Wednesday
A slight chance of showers and thunderstorms. Sunny, with a high near 91. Southwest wind around 10 mph. Chance of precipitation is 20%.
Wednesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 83. West wind 5 to 10 mph. Chance of precipitation is 10%.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 92. Chance of precipitation is 10%.
Thursday Night
Partly cloudy, with a low around 84.
Friday
Mostly sunny, with a high near 90.
Friday Night
Partly cloudy, with a low around 84.
Saturday
Mostly sunny, with a high near 90.
Saturday Night
Partly cloudy, with a low around 84.
Sunday
Mostly sunny, with a high near 90.
Sunday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 84. Chance of precipitation is 20%.
Monday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 90. Chance of precipitation is 20%.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Marathon FL
24.72°N 81.1°W (Elev. 0 ft)
24.72°N 81.1°W (Elev. 0 ft)
9:15 pm EDT Jul 27, 2026
9pm EDT Jul 27, 2026-6pm EDT Aug 3, 2026


