Thompson Island Weather Forecast

    • 63
    • 72

    Slight Chance Rain Showers

    • 55
    • 73

    Mostly Sunny

    • 51
    • 63

    Mostly Sunny

    • 53
    • 65

    Partly Sunny

    • 61
    • 71

    Mostly Sunny

    • 64
    • 78

    Partly Sunny

Today 18 Sep Suffolk

Mostly cloudy with a slight chance of Showers this Morning, then mostly sunny this afternoon. Patchy fog this morning. Highs in the upper 70s. North Winds around 5 Mph, becoming southeast around 5 Mph this afternoon. Chance of rain 20 percent.

Tonight 18 Sep Suffolk

Mostly clear. Lows in the lower 60s. South Winds around 5 Mph, becoming west after midnight.

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Thompson Island Temperature Statistics

September Temperature

Boston, Logan International Airport (3.1 miles)

  • Lowest 9 September, 2025

    54 °F

  • Average September

    65.6 °F

  • Highest 6 September, 2025

    86 °F

Climate (2020–Present)

Boston, Logan International Airport (3.1 miles)

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  • Average Low 2020–2025

    46.9 °F

  • Average 2020–2025

    53.8 °F

  • Average High 2020–2025

    61.1 °F
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