Marathon (FL) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Marathon.
Climate overview of Marathon
Temperatures in Marathon, Florida, United States of America, shift moderately through the seasons. The warmest month is August at 33°C (91°F), and the coolest is January at 24°C (75°F).
The city has a wet climate, receiving around 1138 mm (45 in) of rainfall per year. September is the wettest month. Sunshine peaks in May, when the city sees around 11.4 hours of sunshine per day.
Marathon Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Marathon - and find the best time to visit.
Monthly Temperature in Marathon
The climate in Marathon experiences moderate temperature changes, with mild shifts between seasons. On average, daytime temperatures range from a very warm 33°C (91°F) in August to a comfortable 24°C (75°F) in January.
Nighttime temperatures range from 27°C (81°F) in August to 18°C (64°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Marathon
Marathon has a notably wet climate with abundant precipitation, recording 1138 mm (45 in) of rainfall per year. The seasons in Marathon bring significant changes in precipitation. The wettest month, September, receives heavy rainfall, with an average of 183 mm (7.2 in) of precipitation. This rainfall is distributed across 23 rainy days.
In contrast, the driest month, March, experiences much less rainfall, totaling 33 mm (1.3 in) over 7 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Marathon Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Marathon
Marathon enjoys sunny spells year-round. May sees up to 11.4 hours of daily sunshine, perfect for a sunny trip. November, the least sunny month, still offers a generous 7.7 hours of sun despite this cloudier time of the year.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Marathon by Month
The relative humidity is high throughout the year in Marathon.
The city experiences its highest humidity in February, reaching 76%. In April, the humidity drops to its lowest level at 71%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Marathon
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: January, February, March, April, November and December
- Warmest weather: June, July, August and September
- Most sunshine: April, May and July
- Fewest rainy days: February, March and April
- Wettest months: June, July, August, September and October, when rainfall is highest.
Frequently asked questions about the climate in Marathon
What is the best time to visit Marathon?
January, February, March, April, November and December typically offer the most optimal weather in Marathon. In contrast, August, September and October tend to have less optimal conditions.
What temperatures can I expect in Marathon?
Daytime highs range from 24°C (75°F) in January to 33°C (91°F) in August. Nighttime lows range from 18°C (64°F) to 27°C (81°F).
How much rain does Marathon get?
Annual rainfall is around 1138 mm (45 in). September is the wettest month with 183 mm (7.2 in), while March is the driest with 33 mm (1.3 in).
How sunny is Marathon?
Marathon receives around 3,413 hours of sunshine per year. May is the sunniest month with 341 hours, while November is the cloudiest with just 231 hours. Overall, Marathon enjoys abundant sunshine.
Marathon 3-Day Forecast
Marathon on the map
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