Cranberry Island Weather Forecast

    • 48
    • 68

    Slight Chance Thunderstorms

    • 40
    • 55

    Partly Sunny

    • 46
    • 54

    Partly Sunny

    • 45
    • 53

    Chance Rain Showers

    • 45
    • 51

    Chance Rain Showers

    • 47
    • 54

    Chance Rain Showers

    • 49
    • 60

    Mostly Cloudy

Today 20 May Knox

Partly sunny with isolated Showers. Warm with Highs in the upper 80s. West Winds around 15 Mph with Gusts up to 30 Mph. Chance of rain 20 percent.

Tonight 20 May Knox

Partly cloudy. Less humid with Lows in the upper 40s. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cranberry Island Temperature Statistics

May Temperature

Rockland, Knox County Regional Airport (15.5 miles)

  • Lowest 4 May, 2026

    32 °F

  • Average May

    51.1 °F

  • Highest 17 May, 2026

    82 °F

Climate (2021–Present)

Rockland, Knox County Regional Airport (15.5 miles)

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  • Average Low 2021–2026

    39.6 °F

  • Average 2021–2026

    47.6 °F

  • Average High 2021–2026

    54.8 °F
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