Nantucket Harbor Weather Forecast

    • 25
    • 45

    Decreasing Clouds

    • 20
    • 34

    Mostly Cloudy

    • 34
    • 45

    Slight Chance Rain

    • 38
    • 51

    Chance Rain

    • 33
    • 46

    Chance Rain

    • 29
    • 42

    Chance Snow

Today 7 Dec Nantucket

Partly sunny. Near steady temperature in the lower 40s. West Winds around 5 Mph.

Tonight 7 Dec Nantucket

Mostly cloudy in the Evening, then becoming partly cloudy. Brisk with Lows in the mid 20s. Southwest Winds 10 to 15 Mph, increasing to west 20 to 25 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Nantucket Harbor Temperature Statistics

December Temperature

Nantucket, Nantucket Memorial Airport (2.5 miles)

  • Lowest 5 December, 2025

    21 °F

  • Average December

    37.9 °F

  • Highest 2 December, 2025

    52 °F

Climate (2020–Present)

Nantucket, Nantucket Memorial Airport (2.5 miles)

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  • Average Low 2020–2025

    47.3 °F

  • Average 2020–2025

    53.4 °F

  • Average High 2020–2025

    59.3 °F
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