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Monthly climate in Marathon, Florida, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Marathon features a tropical savanna climate (Aw). Temperatures typically range between 22 °C (71 °F) and 29 °C (84 °F) through the year, but rarely can drop to 11 °C (52 °F) or can rise to as high as 31 °C (88 °F). The average annual precipitation amounts to about 995 mm (39.2 inches) and receives 132 rainy days on the 1 mm (0.04 inches) threshold annually. Marathon enjoys an average of 3732 hours of sunshine throughout the year, and daylight varies from 10 hours 37 minutes to 13 hours 37 minutes per day.

Monthly average temperatures in Marathon, Florida, United States §

The warmest months in Marathon are July, August and September, with daily mean temperatures ranging from 28 to 29 °C (83 - 84 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 22 to 23 °C (71 - 74 °F) throughout the day. On average each year, Marathon experiences 224 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Marathon, Florida, United States. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 26°C
(80°F)		 26°C
(80°F)		 26°C
(80°F)		 29°C
(84°F)		 29°C
(84°F)		 31°C
(88°F)		 31°C
(87°F)		 31°C
(87°F)		 30°C
(86°F)		 29°C
(85°F)		 28°C
(83°F)		 26°C
(80°F)
Mean maximum 25°C
(78°F)		 26°C
(78°F)		 26°C
(79°F)		 27°C
(81°F)		 28°C
(83°F)		 29°C
(85°F)		 30°C
(86°F)		 30°C
(87°F)		 30°C
(86°F)		 29°C
(84°F)		 27°C
(82°F)		 26°C
(79°F)
Average high 23°C
(73°F)		 24°C
(75°F)		 24°C
(76°F)		 26°C
(78°F)		 27°C
(80°F)		 28°C
(83°F)		 29°C
(85°F)		 29°C
(85°F)		 29°C
(84°F)		 28°C
(82°F)		 26°C
(78°F)		 24°C
(76°F)
Daily mean 22°C
(71°F)		 23°C
(74°F)		 23°C
(74°F)		 25°C
(77°F)		 26°C
(79°F)		 28°C
(82°F)		 28°C
(83°F)		 29°C
(84°F)		 28°C
(83°F)		 27°C
(81°F)		 25°C
(77°F)		 23°C
(74°F)
Average low 21°C
(69°F)		 22°C
(72°F)		 22°C
(73°F)		 24°C
(76°F)		 25°C
(78°F)		 27°C
(80°F)		 27°C
(82°F)		 28°C
(82°F)		 27°C
(81°F)		 26°C
(80°F)		 24°C
(75°F)		 22°C
(72°F)
Mean minimum 13°C
(55°F)		 16°C
(62°F)		 17°C
(63°F)		 20°C
(69°F)		 23°C
(74°F)		 25°C
(77°F)		 26°C
(79°F)		 26°C
(79°F)		 25°C
(78°F)		 23°C
(74°F)		 20°C
(68°F)		 16°C
(61°F)
Minimum 11°C
(52°F)		 15°C
(59°F)		 15°C
(60°F)		 18°C
(65°F)		 22°C
(72°F)		 24°C
(75°F)		 25°C
(78°F)		 25°C
(78°F)		 25°C
(77°F)		 19°C
(67°F)		 17°C
(63°F)		 14°C
(58°F)

Compare climate in Marathon with other places

Compare temperature, precipitation, sunshine, UV index in Marathon, Florida, United States with other places around the world.

Monthly average precipitation in Marathon, Florida, United States §

Marathon usually has the most precipitation in May, September and October, with an average of 15 rainy days and 158 mm (6.2 inches) of precipitation per month. The driest months in Marathon are January, February and March. On average, 25 mm (1.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Marathon, Florida, United States. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 24 (1.0) 28 (1.1) 22 (0.9) 44 (1.7) 142 (5.6) 105 (4.1) 90 (3.6) 96 (3.8) 200 (7.9) 131 (5.2) 69 (2.7) 44 (1.7)
Average precipitation days (≥ 1 mm) 4 5 3 7 11 16 16 16 18 18 11 7

Monthly sunshine hours in Marathon, Florida, United States §

The sunniest months in Marathon are April, July and August, when the sun shines an average of 11 hours 9 minutes a day. Least sunny months in Marathon: January, February and November receive an average of 8 hours 56 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Marathon, Florida, United States. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 232 286 332 340 333 320 348 337 317 305 285 291
Mean daily daylight hours 10h 47m 11h 19m 12h 1m 12h 44m 13h 20m 13h 37m 13h 28m 12h 56m 12h 15m 11h 32m 10h 55m 10h 37m

Solar UV radiation in Marathon, Florida, United States §

Marathon experiences the highest level of ultraviolet (UV) radiation in April, June and September, when the maximum UV index can reach values of 12 - 13, which corresponds to the Extreme category of sun exposure. January, November and December are in the High / Very High exposure category. In these months, the maximum values of the UV index do not exceed 8. For more detailed information, check out our hourly Marathon UV Index data.

Average daily maximum UV levels by month for Marathon, Florida, United States. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 7 9 10 12 12 13 12 12 12 10 8 6

Detailed Monthly Weather Insights for Marathon, Florida, United States

Discover in-depth weather details for every month in Marathon. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Marathon's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.