Marathon Weather Forecast

    • 72
    • 80

    Mostly Sunny

    • 72
    • 82

    Mostly Sunny

    • 71
    • 83

    Mostly Sunny

    • 71
    • 82

    Mostly Sunny

    • 58
    • 81

    Partly Sunny

    • 56
    • 67

    Partly Sunny

Today 18 Feb Monroe Middle Keys

Mostly sunny. Highs near 80. Southeast Winds near 10 Mph, decreasing to 5 to 10 Mph.

Tonight 18 Feb Monroe Middle Keys

Mostly clear. Lows near 70. Highs in the lower 80s. Southeast Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Marathon Temperature Statistics

February Temperature

The Florida Keys - Marathon International Airport (2.5 miles)

  • Lowest 1 February, 2026

    44.7 °F

  • Average February

    64.4 °F

  • Highest 15 February, 2026

    78.1 °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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