Key Colony Beach Weather Forecast

    • 79
    • 87

    Chance Thunderstorms

    • 79
    • 88

    Chance Thunderstorms

    • 79
    • 87

    Chance Thunderstorms

    • 79
    • 86

    Chance Thunderstorms

    • 79
    • 86

    Rain Showers Likely

    • 80
    • 86

    Rain Showers Likely

Today 24 Sep Monroe Middle Keys

Partly cloudy with a chance of Showers and a slight chance of Thunderstorms. Highs in the upper 80s. Northwest Winds near 5 Mph. Chance of rain 30 percent.

Tonight 24 Sep Monroe Middle Keys

Partly cloudy with a chance of Showers and a slight chance of Thunderstorms. Lows in the upper 70s. North Winds 5 to 10 Mph. Chance of rain 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Key Colony Beach Temperature Statistics

September Temperature

The Florida Keys - Marathon International Airport (1.9 miles)

  • Lowest 20 September, 2026

    77.6 °F

  • Average September

    85.8 °F

  • Highest 1 September, 2026

    92.6 °F

Climate (2021–2026)

The Florida Keys - Marathon International Airport (1.9 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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