Fiesta Key Weather Forecast

    • 80
    • 86

    Mostly Sunny

    • 80
    • 87

    Partly Sunny

    • 80
    • 87

    Mostly Sunny

    • 80
    • 89

    Slight Chance Thunderstorms

    • 81
    • 88

    Partly Sunny

    • 80
    • 88

    Slight Chance Thunderstorms

Today 19 May Monroe Middle Keys

Mostly sunny. Highs in the mid to upper 80s. East to southeast Winds near 10 Mph, decreasing to 5 to 10 Mph.

Tonight 19 May Monroe Middle Keys

Partly cloudy. Lows near 80. East to southeast Winds near 10 Mph.

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Fiesta Key Temperature Statistics

May Temperature

The Florida Keys - Marathon International Airport (17.4 miles)

  • Lowest 12 May, 2025

    74.6 °F

  • Average May

    81.9 °F

  • Highest 13 May, 2025

    87.7 °F

Climate (2020–Present)

The Florida Keys - Marathon International Airport (17.4 miles)

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  • Average Low 2020–2025

    75.3 °F

  • Average 2020–2025

    80 °F

  • Average High 2020–2025

    85.2 °F
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