Johnston Key - Southwest End Weather Forecast

    • 82
    • 89

    Slight Chance Thunderstorms

    • 81
    • 88

    Slight Chance Thunderstorms

    • 80
    • 88

    Slight Chance Rain Showers

    • 80
    • 87

    Mostly Cloudy

    • 80
    • 86

    Partly Sunny

    • 80
    • 88

    Mostly Sunny

Today 10 May Monroe Lower Keys

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

Tonight 10 May Monroe Lower Keys

Mostly cloudy with a slight chance of Showers and Thunderstorms. Lows in the lower 80s. Southeast Winds near 10 Mph. Chance of rain 10 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Johnston Key - Southwest End Temperature Statistics

May Temperature

Key West Naval Air Station (10.6 miles)

  • Lowest 1 May, 2026

    75 °F

  • Average May

    81.1 °F

  • Highest 8 May, 2026

    89.1 °F

Climate (2021–Present)

Key West Naval Air Station (10.6 miles)

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  • Average Low 2021–2026

    77.2 °F

  • Average 2021–2026

    81.7 °F

  • Average High 2021–2026

    86.5 °F
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