Big Spanish Channel - Mayo Key Weather Forecast

    • 79
    • 89

    Chance Rain Showers

    • 80
    • 90

    Slight Chance Thunderstorms

    • 80
    • 90

    Slight Chance Thunderstorms

    • 81
    • 91

    Slight Chance Thunderstorms

    • 81
    • 90

    Slight Chance Thunderstorms

    • 80
    • 90

    Slight Chance Thunderstorms

Today 20 May Monroe Lower Keys

Mostly sunny with a chance of Showers and a slight chance of Thunderstorms. Highs in the upper 80s. East Winds 10 to 15 Mph. Chance of rain 30 percent.

Tonight 20 May Monroe Lower Keys

Mostly clear with a slight chance of Showers and Thunderstorms. Lows in the lower 80s. East Winds near 15 Mph, decreasing to 10 to 15 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Big Spanish Channel - Mayo Key Temperature Statistics

May Temperature

The Florida Keys - Marathon International Airport (19.3 miles)

  • Lowest 4 May, 2026

    72.6 °F

  • Average May

    81.9 °F

  • Highest 8 May, 2026

    87.7 °F

Climate (2021–Present)

The Florida Keys - Marathon International Airport (19.3 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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