Marathon Weather Forecast

    • 79
    • 88

    Slight Chance Thunderstorms

    • 81
    • 88

    Chance Rain Showers

    • 81
    • 89

    Chance Rain Showers

    • 80
    • 89

    Rain Showers

    • 79
    • 86

    Rain Showers

    • 79
    • 85

    Rain Showers

Today 13 Oct Monroe Middle Keys

Partly cloudy in the Morning, then becoming mostly sunny a slight chance of Showers and Thunderstorms. Highs in the upper 80s. Northeast Winds near 10 Mph. Chance of rain 20 percent.

Tonight 13 Oct Monroe Middle Keys

Mostly clear with a slight chance of Showers and Thunderstorms. Lows in the upper 70s. Northeast Winds 10 to 15 Mph, increasing to near 15 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Marathon Temperature Statistics

October Temperature

The Florida Keys - Marathon International Airport (2.5 miles)

  • Lowest 1 October, 2026

    76.6 °F

  • Average October

    84.7 °F

  • Highest 3 October, 2026

    88.6 °F

Climate (2021–2026)

The Florida Keys - Marathon International Airport (2.5 miles)

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  • Average Low 2021–2026

    75.5 °F

  • Average 2021–2026

    80.2 °F

  • Average High 2021–2026

    85.1 °F
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