Johnston Key - Southwest End Weather Forecast

    • 72
    • 79

    Mostly Sunny

    • 72
    • 79

    Mostly Sunny

    • 73
    • 79

    Breezy

    • 72
    • 79

    Breezy

    • 74
    • 79

    Breezy

    • 74
    • 80

    Breezy

Today 27 Mar Monroe Lower Keys

Partly cloudy in the Morning, then becoming mostly sunny. A slight chance of Showers. Highs in the lower 80s. Northeast to east Winds 10 to 15 Mph. Chance of rain 10 percent.

Tonight 27 Mar Monroe Lower Keys

Mostly clear with a slight chance of Showers. Lows in the lower 70s. Northeast to east Winds 10 to 15 Mph, becoming northeast and decreasing to 5 to 10 Mph. Chance of rain 10 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Johnston Key - Southwest End Temperature Statistics

March Temperature

Key West Naval Air Station (10.6 miles)

  • Lowest 18 March, 2026

    64 °F

  • Average March

    75.8 °F

  • Highest 5 March, 2026

    84 °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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