Marathon Weather Forecast

    • 72
    • 88

    Chance Rain Showers

    • 69
    • 79

    Partly Sunny

    • 72
    • 80

    Partly Sunny

    • 73
    • 81

    Chance Rain Showers

    • 72
    • 81

    Chance Rain Showers

    • 70
    • 82

    Chance Rain Showers

    • 72
    • 81

    Slight Chance Thunderstorms

Today 18 Mar Monroe Middle Keys

Mostly sunny with a slight chance of Showers. Highs in the mid to upper 80s. South to southwest Winds 5 to 10 Mph, becoming southwest to west near 10 Mph in the afternoon. Chance of rain 10 percent.

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Marathon Temperature Statistics

March Temperature

The Florida Keys - Marathon International Airport (2.5 miles)

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  • Average March

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Climate (2019–Present)

The Florida Keys - Marathon International Airport (2.5 miles)

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  • Average Low 2019–2024

    75.5 °F
  • Average 2019–2024

    80.1 °F
  • Average High 2019–2024

    85.5 °F
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