Siasconset Weather Forecast

    • 61
    • 63

    Rain Showers

    • 61
    • 66

    Rain Showers Likely

    • 59
    • 65

    Chance Rain Showers

    • 58
    • 63

    Mostly Cloudy

    • 58
    • 63

    Partly Sunny

    • 59
    • 65

    Partly Sunny

Today 26 Sep Nantucket

Showers with a chance of Thunderstorms. Patchy fog. Windy. Near steady temperature in the lower 60s. Northeast Winds 25 to 30 Mph with Gusts up to 50 Mph. Chance of rain near 100 percent.

Tonight 26 Sep Nantucket

Showers with a chance of Thunderstorms in the Evening, then Showers with a slight chance of Thunderstorms after midnight. Patchy fog. Breezy with Lows in the lower 60s. Northeast Winds 20 to 25 Mph with Gusts up to 50 Mph. Chance of rain near 100 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Siasconset Temperature Statistics

September Temperature

Nantucket, Nantucket Memorial Airport (4.3 miles)

  • Lowest 15 September, 2026

    50 °F

  • Average September

    64.8 °F

  • Highest 4 September, 2026

    78.1 °F

Climate (2021–2026)

Nantucket, Nantucket Memorial Airport (4.3 miles)

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  • Average Low 2021–2026

    46.7 °F

  • Average 2021–2026

    52.9 °F

  • Average High 2021–2026

    58.8 °F
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