Marathon Weather Forecast

    • 68
    • 82

    Decreasing Clouds

    • 55
    • 80

    Breezy

    • 50
    • 62

    Mostly Sunny

    • 54
    • 60

    Mostly Sunny

    • 65
    • 70

    Partly Sunny

    • 68
    • 77

    Partly Sunny

Today 21 Feb Monroe Middle Keys

Partly sunny this Morning, then becoming mostly sunny. Highs in the lower 80s. East to southeast Winds 5 to 10 Mph, becoming southeast to south and decreasing to near 5 Mph in the afternoon.

Tonight 21 Feb Monroe Middle Keys

Partly cloudy. Lows in the upper 60s. Light and variable Winds.

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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 °F

  • Highest 16 February, 2026

    80.7 °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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