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Get the monthly weather forecast for Marathon, FL, including daily high/low, historical averages, to help you plan ahead.
Check accurate weather in December in Marathon (FL). Expect Marathon December temperature around 25°C (77°F). Read clothing tips & recommended activities.
December Weather in Marathon Florida, United States. Daily high temperatures decrease by 3°F, from 79°F to 76°F, rarely falling below 67°F or exceeding 83°F. Daily low temperatures decrease by 4°F, from 70°F to 66°F, rarely falling below 56°F or exceeding 76°F.
Weather.com brings you the most accurate monthly weather forecast for Marathon, FL with average/record and high/low temperatures, precipitation and more.
The hottest month of the year in Marathon is August, with an average high of 90°F and low of 81°F. The cool season lasts for 2.9 months, from December 6 to March 1, with an average daily high temperature below 78°F. The coldest month of the year in Marathon is January, with an average low of 65°F and high of 75°F.
The weather in Marathon in December is pleasantly warm with a gentle breeze, with average highs of 76°F (24°C) and lows of 72°F (22°C).
Get the monthly weather forecast for The Florida Keys Marathon Airport, FL, including daily high/low, historical averages, to help you plan ahead.
