Big Spanish Channel - Mayo Key Weather Forecast

    • 81
    • 92

    Rain Showers Likely

    • 81
    • 92

    Chance Thunderstorms

    • 81
    • 92

    Chance Thunderstorms

    • 81
    • 92

    Chance Thunderstorms

    • 81
    • 92

    Rain Showers Likely

    • 81
    • 92

    Rain Showers Likely

Today 10 Sep Monroe Lower Keys

Partly sunny with a chance of Showers and Thunderstorms. Highs near 90. East Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 10 Sep Monroe Lower Keys

Partly cloudy with a chance of Showers and a slight chance of Thunderstorms. Lows in the lower 80s. East to southeast Winds 5 to 10 Mph. Chance of rain 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Big Spanish Channel - Mayo Key Temperature Statistics

September Temperature

The Florida Keys - Marathon International Airport (19.3 miles)

  • Lowest 4 September, 2026

    78.7 °F

  • Average September

    86.6 °F

  • Highest 1 September, 2026

    92.6 °F

Climate (2021–2026)

The Florida Keys - Marathon International Airport (19.3 miles)

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  • Average Low 2021–2026

    75.5 °F

  • Average 2021–2026

    80.1 °F

  • Average High 2021–2026

    85.1 °F
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