East Key - Southern End Weather Forecast

    • 78
    • 86

    Thunderstorms

    • 79
    • 87

    Thunderstorms

    • 80
    • 86

    Thunderstorms

    • 80
    • 86

    Thunderstorms

    • 80
    • 87

    Thunderstorms

    • 80
    • 87

    Thunderstorms

Today 19 Sep Monroe Upper Keys

Partly sunny with a chance of Showers and a slight chance of Thunderstorms. Highs in the upper 80s. North to northeast Winds 5 to 10 Mph. Chance of rain 40 percent.

Tonight 19 Sep Monroe Upper Keys

Partly cloudy with a chance of Showers and a slight chance of Thunderstorms. Lows in the upper 70s. Northeast Winds 5 to 10 Mph. Chance of rain 40 percent.

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East Key - Southern End Temperature Statistics

September Temperature

The Florida Keys - Marathon International Airport (32.9 miles)

  • Lowest 13 September, 2025

    73.9 °F

  • Average September

    83.5 °F

  • Highest 11 September, 2025

    89.1 °F

Climate (2020–Present)

The Florida Keys - Marathon International Airport (32.9 miles)

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  • Average Low 2020–2025

    75.4 °F

  • Average 2020–2025

    80 °F

  • Average High 2020–2025

    85.1 °F
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