Johnston Key - Southwest End Weather Forecast

    • 73
    • 79

    Chance Rain Showers

    • 74
    • 79

    Chance Rain Showers

    • 73
    • 80

    Chance Rain Showers

    • 74
    • 79

    Mostly Cloudy

    • 74
    • 80

    Partly Sunny

    • 74
    • 80

    Partly Sunny

Today 29 Mar Monroe Lower Keys

Partly cloudy in the Morning, then becoming mostly sunny. A slight chance of Showers. Becoming breezy. Highs in the lower 80s. Northeast to east Winds 10 to 15 Mph, increasing to 15 to 20 Mph in the afternoon. Chance of rain 10 percent.

Tonight 29 Mar Monroe Lower Keys

Partly cloudy with a chance of Showers. Breezy. Lows in the lower 70s. Northeast to east Winds 15 to 20 Mph, becoming east. Chance of rain 30 percent.

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Johnston Key - Southwest End Temperature Statistics

March Temperature

Key West Naval Air Station (10.6 miles)

  • Lowest 18 March, 2026

    64 °F

  • Average March

    75.7 °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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