Islesboro Island - Ruder Cove Weather Forecast

    • 28
    • 40

    Decreasing Clouds

    • 39
    • 44

    Breezy

    • 24
    • 51

    Rain

    • 28
    • 35

    Chance Rain/Snow

    • 20
    • 41

    Slight Chance Rain

    • 15
    • 28

    Partly Sunny

Today 17 Dec Coastal Waldo

Partly sunny. Highs in the upper 30s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 17 Dec Coastal Waldo

Partly cloudy. Lows in the lower 20s. Southwest Winds around 10 Mph with Gusts up to 25 Mph.

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Islesboro Island - Ruder Cove Temperature Statistics

December Temperature

Rockland, Knox County Regional Airport (21.1 miles)

  • Lowest 9 December, 2025

    -2 °F

  • Average December

    25.5 °F

  • Highest 10 December, 2025

    45 °F

Climate (2020–Present)

Rockland, Knox County Regional Airport (21.1 miles)

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  • Average Low 2020–2025

    39.9 °F

  • Average 2020–2025

    47.9 °F

  • Average High 2020–2025

    55.2 °F
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