Cranberry Island Weather Forecast

    • 43
    • 46

    Chance Rain

    • 28
    • 51

    Rain

    • 33
    • 40

    Chance Rain

    • 22
    • 43

    Breezy

    • 19
    • 26

    Blustery

    • 27
    • 35

    Chance Rain/Snow

Today 18 Dec Knox

Partly sunny. Highs in the mid 40s. Light and variable Winds, becoming south around 10 Mph with Gusts up to 25 Mph this afternoon.

Tonight 18 Dec Knox

Partly cloudy in the Evening, then cloudy with a slight chance of rain after midnight. Patchy fog after midnight. Lows in the mid 30s. South Winds 15 to 20 Mph. Gusts up to 35 Mph after midnight. Chance of rain 20 percent.

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Cranberry Island Temperature Statistics

December Temperature

Rockland, Knox County Regional Airport (15.5 miles)

  • Lowest 9 December, 2025

    -2 °F

  • Average December

    25.1 °F

  • Highest 10 December, 2025

    45 °F

Climate (2020–Present)

Rockland, Knox County Regional Airport (15.5 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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