Marathon Weather Forecast

    • 77
    • 80

    Chance Thunderstorms

    • 76
    • 80

    Rain Showers Likely

    • 67
    • 81

    Rain Showers Likely

    • 63
    • 73

    Chance Rain Showers

    • 66
    • 72

    Chance Rain Showers

    • 67
    • 74

    Chance Rain Showers

Today 14 Mar Monroe Middle Keys

Partly sunny with a chance of Showers and a slight chance of Thunderstorms. Highs in the lower to mid 80s. Variable Winds near 5 Mph, becoming east to southeast 5 to 10 Mph. Chance of rain 40 percent.

Tonight 14 Mar Monroe Middle Keys

Mostly cloudy with a chance of Showers and Thunderstorms. Lows in the mid 70s. East to southeast Winds increasing to 10 to 15 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Marathon Temperature Statistics

March Temperature

The Florida Keys - Marathon International Airport (2.5 miles)

  • Lowest 1 March, 2026

    70.6 °F

  • Average March

    78.2 °F

  • Highest 6 March, 2026

    83.6 °F

Climate (2021–Present)

The Florida Keys - Marathon International Airport (2.5 miles)

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  • Average Low 2021–2026

    75.3 °F

  • Average 2021–2026

    80 °F

  • Average High 2021–2026

    85.1 °F
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