Duck Key Weather Forecast

    • 81
    • 87

    Rain Showers Likely

    • 80
    • 87

    Chance Thunderstorms

    • 81
    • 87

    Chance Thunderstorms

    • 80
    • 88

    Chance Thunderstorms

    • 80
    • 87

    Chance Thunderstorms

    • 80
    • 87

    Chance Thunderstorms

Today 7 Sep Monroe Middle Keys

Partly sunny with a chance of Showers and Thunderstorms. Highs in the upper 80s. South Winds near 5 Mph. Chance of rain 50 percent.

Tonight 7 Sep Monroe Middle Keys

Mostly cloudy with a chance of Showers and Thunderstorms. Lows near 80. Southwest Winds near 5 Mph. Chance of rain 50 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Duck Key Temperature Statistics

September Temperature

The Florida Keys - Marathon International Airport (8.7 miles)

  • Lowest 4 September, 2025

    75 °F

  • Average September

    82.1 °F

  • Highest 1 September, 2025

    88 °F

Climate (2020–Present)

The Florida Keys - Marathon International Airport (8.7 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    75.4 °F

  • Average 2020–2025

    80 °F

  • Average High 2020–2025

    85.1 °F
Get WillyWeather+ to remove ads