Williams Island Weather Forecast

    • 50
    • 64

    Partly Sunny

    • 51
    • 68

    Partly Sunny

    • 49
    • 68

    Partly Sunny

    • 51
    • 70

    Partly Sunny

    • 52
    • 71

    Mostly Sunny

Today 13 Sep Coastal Washington

Partly sunny early this Morning, then becoming mostly cloudy. Patchy fog early this morning. Highs in the upper 60s. South Winds 5 to 10 Mph.

Tonight 13 Sep Coastal Washington

Mostly cloudy in the Evening, then becoming partly cloudy. Lows around 50. South Winds around 5 Mph.

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Williams Island Temperature Statistics

September Temperature

Bar Harbor, Hancock County-Bar Harbor Airport (65.9 miles)

  • Lowest 10 September, 2025

    44.1 °F

  • Average September

    61.1 °F

  • Highest 1 September, 2025

    78.1 °F

Climate (2020–Present)

Bar Harbor, Hancock County-Bar Harbor Airport (65.9 miles)

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  • Average Low 2020–2025

    38.5 °F

  • Average 2020–2025

    46.7 °F

  • Average High 2020–2025

    54.8 °F
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