Weather Forecast and Radar for Marathon, Florida

Weather in Marathon, FL

Marathon, Florida is an island located in the middle of the Florida Keys, making it a popular vacation spot for locals and tourists alike. It has a tropical climate, with year-round temperatures hovering in the mid-to-upper 70s and low 80s.

In the winter months (December to March), temperatures remain mild in Marathon, typically ranging from the mid-70s to mid-80s, with little to no rain and plenty of sunshine. January is the coldest month, with temperatures usually staying between 75°F and 82°F throughout the day.

As spring arrives in April, temperatures start to rise and the days become longer, with the average daily temperature ranging from 80°F to 87°F. April is also the start of the rainy season, with showers happening sporadically throughout the month.

The summer months (May to September) are the warmest time of year in Marathon, with temperatures reaching highs of 90°F and lows of 80°F. The humidity is also higher in this time, making the heat more oppressive. The rainy season continues through the summer, with occasional showers and thunderstorms.

The fall months (October to November) are a bit cooler, with temperatures dropping back to the mid-70s. The rainy season usually ends in October, but there is still occasional rainfall throughout the rest of the year. The days become shorter and the nights become cooler, making it the perfect time to enjoy the outdoors.

Fast Facts About Marathon, FL

As of 2020, the city population is 8746.

Major Cities Nearby Marathon, FL

This map shows the current & 7-day weather forecast, weather alerts, and weather radar for Marathon, Florida.