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Marathon Weather

Average monthly temperature and rainfall in Marathon

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Marathon, located in South Florida's Keys, has an overall average high temperature of 84° and an average low of 66°.

The highest recorded temperature in Marathon was 104° in 1998 and the lowest recorded temperature was a very 25° in 1989. On average Marathon's warmest month is July and January is the average coolest month. The maximum average rainfall usually falls in August.

January

  • Average High: 77° F
  • Average Low: 56° F
  • Average Precipitation: 1.94 inches

February

  • Average High Temperature: 78° F
  • Average Low Temperature: 57° F
  • Average Precipitation: 1.63 inches

March

  • Average High Temperature: 80° F
  • Average Low Temperature: 60° F
  • Average Precipitation: 1.84 inches

April

  • Average High Temperature: 83° F
  • Average Low Temperature: 64° F
  • Average Precipitation: 2.06 inches

May

  • Average High Temperature: 87° F
  • Average Low Temperature: 69° F
  • Average Precipitation: 5.06 inches

June

  • Average High Temperature: 89° F
  • Average Low Temperature: 73° F
  • Average Precipitation: 7.25 inches

July

  • Average High Temperature: 90° F
  • Average Low Temperature: 74° F
  • Average Precipitation: 4.73 inches

August

  • Average High Temperature: 90° F
  • Average Low Temperature: 74° F
  • Average Precipitation: 7.43 inches

September

  • Average High Temperature: 89° F
  • Average Low Temperature: 74° F
  • Average Precipitation: 7.20 inches

October

  • Average High Temperature: 87° F
  • Average Low Temperature: 69° F
  • Average Precipitation: 4.26 inches

November

  • Average High Temperature: 83° F
  • Average Low Temperature: 64° F
  • Average Precipitation: 2.46 inches

December

  • Average High Temperature: 79° F
  • Average Low Temperature: 59° F
  • Average Precipitation: 1.57 inches

Visit weather.com for current weather conditions, 5- or 10-day forecast and more.

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