Fiesta Key Weather Forecast

    • 78
    • 85

    Slight Chance Thunderstorms

    • 79
    • 85

    Slight Chance Thunderstorms

    • 79
    • 85

    Chance Thunderstorms

    • 79
    • 85

    Rain Showers Likely

    • 79
    • 85

    Rain Showers Likely

    • 80
    • 86

    Rain Showers Likely

Today 25 Sep Monroe Middle Keys

Mostly sunny with a chance of Showers and a slight chance of Thunderstorms. Highs in the upper 80s. North Winds near 10 Mph, decreasing to 5 to 10 Mph. Chance of rain 30 percent.

Tonight 25 Sep Monroe Middle Keys

Mostly clear with a slight chance of Showers and Thunderstorms. Lows in the upper 70s. Northeast Winds 5 to 10 Mph. Chance of rain 20 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Fiesta Key Temperature Statistics

September Temperature

The Florida Keys - Marathon International Airport (17.4 miles)

  • Lowest 20 September, 2026

    77.6 °F

  • Average September

    85.7 °F

  • Highest 1 September, 2026

    92.6 °F

Climate (2021–2026)

The Florida Keys - Marathon International Airport (17.4 miles)

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

  • Average Low 2021–2026

    75.5 °F

  • Average 2021–2026

    80.2 °F

  • Average High 2021–2026

    85.1 °F
Get WillyWeather+ to remove ads