Siasconset Weather Forecast

    • 61
    • 70

    Increasing Clouds

    • 53
    • 66

    Mostly Sunny

    • 63
    • 68

    Mostly Sunny

    • 62
    • 70

    Partly Sunny

    • 64
    • 71

    Chance Rain Showers

    • 61
    • 75

    Chance Rain Showers

Today 5 Sep Nantucket

Sunny. Highs around 70. North Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 5 Sep Nantucket

Partly cloudy. Near steady temperature in the lower 60s. North Winds 10 to 15 Mph with Gusts up to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Siasconset Temperature Statistics

September Temperature

Nantucket, Nantucket Memorial Airport (4.3 miles)

  • Lowest 2 September, 2026

    57.9 °F

  • Average September

    64.5 °F

  • Highest 2 September, 2026

    72 °F

Climate (2021–2026)

Nantucket, Nantucket Memorial Airport (4.3 miles)

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  • Average Low 2021–2026

    46.8 °F

  • Average 2021–2026

    53 °F

  • Average High 2021–2026

    58.8 °F
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