Cape Sable Weather Forecast

    • 78
    • 86

    Rain Showers Likely

    • 78
    • 86

    Rain Showers Likely

    • 77
    • 85

    Rain Showers

    • 78
    • 86

    Rain Showers Likely

    • 77
    • 87

    Rain Showers Likely

    • 76
    • 87

    Rain Showers Likely

    • 76
    • 86

    Rain Showers Likely

Today 21 Sep Mainland Monroe

Partly sunny with a chance of Thunderstorms. A chance of Showers in the Morning, then Showers likely in the afternoon. Highs in the upper 80s. Chance of rain 60 percent.

Tonight 21 Sep Mainland Monroe

Partly cloudy with a chance of Showers. A chance of Thunderstorms, mainly this evening. Lows in the mid 70s. Southeast Winds around 5 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cape Sable Temperature Statistics

September Temperature

The Florida Keys - Marathon International Airport (26.7 miles)

  • Lowest 4 September, 2026

    78.7 °F

  • Average September

    86 °F

  • Highest 1 September, 2026

    92.6 °F

Climate (2021–2026)

The Florida Keys - Marathon International Airport (26.7 miles)

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  • Average Low 2021–2026

    75.5 °F

  • Average 2021–2026

    80.2 °F

  • Average High 2021–2026

    85.1 °F
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