Johnson Keys - South End Weather Forecast

    • 83
    • 89

    Slight Chance Thunderstorms

    • 84
    • 90

    Slight Chance Thunderstorms

    • 83
    • 90

    Slight Chance Thunderstorms

    • 83
    • 90

    Mostly Sunny

    • 83
    • 90

    Partly Sunny

    • 84
    • 90

    Slight Chance Thunderstorms

Today 18 Jul Monroe Lower Keys

Partly sunny with a slight chance of Showers and Thunderstorms. Highs near 90. Southeast Winds near 10 Mph. Chance of rain 20 percent.

Tonight 18 Jul Monroe Lower Keys

Partly cloudy with a slight chance of Showers and Thunderstorms. Lows in the lower 80s. Southeast Winds near 10 Mph, increasing to 10 to 15 Mph. Chance of rain 20 percent.

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Johnson Keys - South End Temperature Statistics

July Temperature

The Florida Keys - Marathon International Airport (15.5 miles)

  • Lowest 10 July, 2026

    74.6 °F

  • Average July

    86.7 °F

  • Highest 7 July, 2026

    91.7 °F

Climate (2021–2026)

The Florida Keys - Marathon International Airport (15.5 miles)

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  • Average Low 2021–2026

    75.4 °F

  • Average 2021–2026

    80.1 °F

  • Average High 2021–2026

    85 °F
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