Big Spanish Key Weather Forecast

    • 68
    • 77

    Partly Sunny

    • 68
    • 75

    Partly Sunny

    • 71
    • 77

    Partly Sunny

    • 72
    • 78

    Rain Showers

    • 70
    • 78

    Rain Showers

    • 69
    • 77

    Breezy

    • 71
    • 77

    Partly Sunny

Today 10 Dec Monroe Lower Keys

Partly sunny Early, then becoming mostly sunny. Isolated Showers. Highs in the upper 70s. North Winds 5 to 10 Mph. Chance of rain 10 percent.

Tonight 10 Dec Monroe Lower Keys

Partly cloudy with a slight chance of Showers. Lows in the mid to upper 60s. North Winds near 10 Mph, becoming northwest to north and increasing to 10 to 15 Mph. Chance of rain 10 percent.

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Big Spanish Key Temperature Statistics

December Temperature

Key West Naval Air Station (21.7 miles)

  • Lowest 3 December, 2025

    70 °F

  • Average December

    77.6 °F

  • Highest 7 December, 2025

    84.9 °F

Climate (2020–Present)

Key West Naval Air Station (21.7 miles)

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  • Average Low 2020–2025

    77.3 °F

  • Average 2020–2025

    81.8 °F

  • Average High 2020–2025

    86.5 °F
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