Lieutenant Island Weather Forecast

    • 49
    • 59

    Sunny

    • 48
    • 62

    Increasing Clouds

    • 42
    • 51

    Mostly Sunny

    • 47
    • 52

    Mostly Sunny

    • 54
    • 59

    Mostly Sunny

    • 52
    • 62

    Mostly Sunny

    • 52
    • 58

    Partly Sunny

Today 25 Oct Barnstable

Partly sunny. Highs in the lower 60s.

Tonight 25 Oct Barnstable

Clear. Lows around 40. Southwest Winds 5 to 10 Mph.

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Lieutenant Island Temperature Statistics

October Temperature

Chatham, Chatham Municipal Airport (14.3 miles)

  • Lowest 23 October, 2026

    37 °F

  • Average October

    56.3 °F

  • Highest 14 October, 2026

    72 °F

Climate (2021–2026)

Chatham, Chatham Municipal Airport (14.3 miles)

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  • Average Low 2021–2026

    47.2 °F

  • Average 2021–2026

    53.5 °F

  • Average High 2021–2026

    59.6 °F
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