Marathon Weather Forecast

    • 69
    • 78

    Slight Chance Rain Showers

    • 70
    • 77

    Mostly Sunny

    • 70
    • 78

    Mostly Sunny

    • 71
    • 78

    Mostly Sunny

    • 72
    • 78

    Mostly Sunny

    • 72
    • 78

    Mostly Sunny

Today 28 Feb Monroe Middle Keys

Partly cloudy with a slight chance of Showers. Highs in the lower 80s. Variable Winds near 5 Mph. Chance of rain 10 percent.

Tonight 28 Feb Monroe Middle Keys

Partly cloudy with a slight chance of Showers. Lows in the upper 60s. Variable Winds near 5 Mph, becoming north to northeast 5 to 10 Mph. Chance of rain 20 percent.

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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

    66.8 °F

  • Highest 22 February, 2026

    82 °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 °F
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