Grassy Key - South Side Weather Forecast

    • 84
    • 92

    Mostly Sunny

    • 84
    • 91

    Mostly Sunny

    • 84
    • 92

    Partly Sunny

    • 84
    • 92

    Partly Sunny

    • 83
    • 88

    Partly Sunny

    • 83
    • 88

    Mostly Sunny

Today 13 Jul Monroe Middle Keys

Sunny. Highs near 90. East to southeast Winds 5 to 10 Mph.

Tonight 13 Jul Monroe Middle Keys

Mostly clear. Lows in the lower to mid 80s. East to southeast Winds near 10 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Grassy Key - South Side Temperature Statistics

July Temperature

The Florida Keys - Marathon International Airport (5.6 miles)

  • Lowest 10 July, 2026

    75.9 °F

  • Average July

    87.5 °F

  • Highest 7 July, 2026

    91.7 °F

Climate (2021–2026)

The Florida Keys - Marathon International Airport (5.6 miles)

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

  • Average Low 2021–2026

    75.4 °F

  • Average 2021–2026

    80.1 °F

  • Average High 2021–2026

    85 °F
Get WillyWeather+ to remove ads