Boston Harbor Islands State Park Weather Forecast

    • 35
    • 41

    Gradual Clearing

    • 33
    • 42

    Mostly Sunny

    • 44
    • 49

    Chance Rain

    • 42
    • 48

    Rain

    • 32
    • 46

    Chance Rain

    • 31
    • 36

    Partly Sunny

    • 36
    • 41

    Mostly Cloudy

Today 7 Jan Eastern Plymouth

Mostly cloudy with a 40 percent chance of rain. Patchy fog. Highs in the lower 40s. Northwest Winds 5 to 10 Mph.

Tonight 7 Jan Eastern Plymouth

Partly cloudy in the Evening, then clearing. Near steady temperature in the lower 30s. Northwest Winds 5 to 10 Mph.

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Boston Harbor Islands State Park Temperature Statistics

January Temperature

Boston, Logan International Airport (5.6 miles)

  • Lowest 5 January, 2026

    16 °F

  • Average January

    24.4 °F

  • Highest 3 January, 2026

    32 °F

Climate (2021–Present)

Boston, Logan International Airport (5.6 miles)

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  • Average Low 2021–2026

    46.9 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    61 °F
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