Marathon Weather Forecast
- 82
- 88
Chance Thunderstorms
- 82
- 88
Chance Rain Showers
- 80
- 88
Chance Rain Showers
- 81
- 87
Chance Rain Showers
- 81
- 87
Chance Rain Showers
- 82
- 87
Chance Rain Showers
Today 11 Jul Monroe Middle Keys
Partly cloudy with a chance of Showers and a slight chance of Thunderstorms. Highs in the upper 80s. East to southeast Winds near 10 Mph. Chance of rain 40 percent.
Tonight 11 Jul Monroe Middle Keys
Partly cloudy with a chance of Showers and a slight chance of Thunderstorms. Lows in the lower 80s. East to southeast Winds near 10 Mph. Chance of rain 40 percent.
Marathon Temperature Statistics
July Temperature
The Florida Keys - Marathon International Airport (2.5 miles)
Lowest 5 July, 2025
78.1 °FAverage July
84.4 °FHighest 8 July, 2025
91 °F
Climate (2020–Present)
The Florida Keys - Marathon International Airport (2.5 miles)
Average Low 2020–2025
75.3 °FAverage 2020–2025
80 °FAverage High 2020–2025
85.1 °F