Nassau River - Mesa Marsh Weather Forecast

    • 64
    • 70

    Chance Rain Showers

    • 50
    • 69

    Becoming Sunny

    • 53
    • 62

    Mostly Sunny

    • 57
    • 66

    Mostly Sunny

    • 58
    • 61

    Partly Sunny

    • 55
    • 66

    Mostly Sunny

    • 56
    • 67

    Mostly Sunny

Today 18 Dec Coastal Nassau

Mostly cloudy with a chance of Showers. A slight chance of Thunderstorms this afternoon. Highs in the lower 70s. Southeast Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 18 Dec Coastal Nassau

Mostly cloudy. Showers likely with a slight chance of Thunderstorms this Evening, then a chance of Showers after midnight. Lows in the lower 60s. South Winds 10 to 15 Mph. Chance of rain 50 percent.

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Nassau River - Mesa Marsh Temperature Statistics

December Temperature

Fernandina Beach Municipal Airport (5 miles)

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  • Average December

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Climate (2020–Present)

Fernandina Beach Municipal Airport (5 miles)

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  • Average Low 2020–2025

    62.4 °F

  • Average 2020–2025

    69.7 °F

  • Average High 2020–2025

    77.9 °F
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