Lieutenant Island Weather Forecast

    • 65
    • 74

    Chance Rain Showers

    • 64
    • 71

    Rain Showers Likely

    • 65
    • 72

    Rain Showers Likely

    • 67
    • 75

    Mostly Sunny

    • 71
    • 84

    Partly Sunny

    • 70
    • 84

    Chance Rain Showers

Today 5 Jul Barnstable

Mostly sunny. Humid with Highs around 80. Northeast Winds 5 to 10 Mph.

Tonight 5 Jul Barnstable

Mostly cloudy. A chance of. Lows in the mid 60s. Southeast Winds around 5 Mph.

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Lieutenant Island Temperature Statistics

July Temperature

Chatham, Chatham Municipal Airport (14.3 miles)

  • Lowest 1 July, 2026

    69.1 °F

  • Average July

    74.3 °F

  • Highest 2 July, 2026

    81 °F

Climate (2021–2026)

Chatham, Chatham Municipal Airport (14.3 miles)

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  • Average Low 2021–2026

    47.4 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    59.8 °F
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