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.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Marathon Temperature Statistics

July Temperature

The Florida Keys - Marathon International Airport (2.5 miles)

  • Lowest 5 July, 2025

    78.1 °F

  • Average July

    84.4 °F

  • Highest 8 July, 2025

    91 °F

Climate (2020–Present)

The Florida Keys - Marathon International Airport (2.5 miles)

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  • Average Low 2020–2025

    75.3 °F

  • Average 2020–2025

    80 °F

  • Average High 2020–2025

    85.1 °F
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