Castle Island Weather Forecast

    • 55
    • 71

    Increasing Clouds

    • 49
    • 64

    Partly Sunny

    • 50
    • 63

    Partly Sunny

    • 54
    • 66

    Mostly Cloudy

    • 52
    • 61

    Mostly Cloudy

    • 50
    • 58

    Mostly Cloudy

Today 28 Sep Suffolk

Sunny. Highs around 70. West Winds 5 to 10 Mph.

Tonight 28 Sep Suffolk

Partly cloudy in the Evening, then clearing. Lows in the lower 50s. Northwest Winds 5 to 10 Mph.

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Castle Island Temperature Statistics

September Temperature

Boston, Logan International Airport (1.2 miles)

  • Lowest 24 September, 2022

    48.9 °F
  • Average September

    65.9 °F
  • Highest 18 September, 2022

    84 °F

Climate (2010–Present)

Boston, Logan International Airport (1.2 miles)

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  • Average Low 2010–Present

    47.5 °F
  • Average 2010–Present

    54.3 °F
  • Average High 2010–Present

    61.4 °F
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