Key West Weather Forecast

    • 79
    • 88

    Slight Chance Thunderstorms

    • 79
    • 88

    Mostly Sunny

    • 79
    • 89

    Mostly Sunny

    • 77
    • 88

    Partly Sunny

    • 76
    • 86

    Partly Sunny

    • 76
    • 85

    Partly Sunny

Today 21 Sep Escambia Coastal

Sunny. A slight chance of Showers and Thunderstorms in the afternoon. Humid with Highs around 90. North Winds around 5 Mph, becoming southeast around 5 Mph in the afternoon. Chance of rain 20 percent.

Tonight 21 Sep Escambia Coastal

Partly cloudy in the Evening, then mostly clear with a slight chance of Showers and Thunderstorms after midnight. Humid with Lows in the mid 70s. Southwest Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 20 percent.

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Key West Temperature Statistics

September Temperature

Jack Edwards Airport (9.3 miles)

  • Lowest 18 September, 2026

    69.8 °F

  • Average September

    80.5 °F

  • Highest 7 September, 2026

    95 °F

Climate (2021–2026)

Jack Edwards Airport (9.3 miles)

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  • Average Low 2021–2026

    61 °F

  • Average 2021–2026

    67.7 °F

  • Average High 2021–2026

    78 °F
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