Johnston Key - Southwest End Weather Forecast

    • 84
    • 91

    Slight Chance Thunderstorms

    • 83
    • 91

    Slight Chance Thunderstorms

    • 83
    • 91

    Slight Chance Thunderstorms

    • 83
    • 91

    Thunderstorms Likely

    • 84
    • 91

    Chance Thunderstorms

    • 84
    • 91

    Chance Thunderstorms

    • 84
    • 91

    Chance Thunderstorms

Today 22 Aug Monroe Lower Keys

Mostly sunny with a slight chance of Showers and Thunderstorms. Highs in the lower 90s. Southeast Winds near 5 Mph. Chance of rain 20 percent.

Tonight 22 Aug Monroe Lower Keys

Partly cloudy with a slight chance of Showers and Thunderstorms. Lows in the lower 80s. Southeast Winds 5 to 10 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Johnston Key - Southwest End Temperature Statistics

August Temperature

Key West Naval Air Station (10.6 miles)

  • Lowest 6 August, 2026

    75.9 °F

  • Average August

    86.4 °F

  • Highest 14 August, 2026

    93 °F

Climate (2021–2026)

Key West Naval Air Station (10.6 miles)

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  • Average Low 2021–2026

    77.3 °F

  • Average 2021–2026

    81.8 °F

  • Average High 2021–2026

    86.5 °F
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