Marathon Weather Forecast

    • 76
    • 85

    Mostly Sunny

    • 77
    • 85

    Mostly Sunny

    • 77
    • 86

    Mostly Sunny

    • 76
    • 86

    Mostly Sunny

    • 77
    • 82

    Mostly Sunny

    • 77
    • 83

    Partly Sunny

Today 27 Apr Monroe Middle Keys

Mostly sunny with a slight chance of Showers. Highs in the mid 80s. Light and variable Winds. Chance of rain 10 percent.

Tonight 27 Apr Monroe Middle Keys

Mostly clear with a slight chance of Showers. Lows in the mid 70s. North to northeast Winds 5 to 10 Mph, becoming northeast to east and increasing to near 10 Mph. Chance of rain 10 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Marathon Temperature Statistics

April Temperature

The Florida Keys - Marathon International Airport (2.5 miles)

  • Lowest 11 April, 2026

    72.6 °F

  • Average April

    78.3 °F

  • Highest 18 April, 2026

    83.6 °F

Climate (2021–Present)

The Florida Keys - Marathon International Airport (2.5 miles)

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

  • Average Low 2021–2026

    75.3 °F

  • Average 2021–2026

    80 °F

  • Average High 2021–2026

    85 °F
Get WillyWeather+ to remove ads