Lieutenant Island Weather Forecast

    • 61
    • 72

    Becoming Sunny

    • 62
    • 75

    Mostly Sunny

    • 69
    • 72

    Rain Showers

    • 68
    • 79

    Rain Showers Likely

    • 68
    • 76

    Chance Rain Showers

    • 68
    • 75

    Partly Sunny

Today 19 Jul Barnstable

Sunny with Highs in the lower 80s. Northwest Winds 10 to 15 Mph.

Tonight 19 Jul Barnstable

Mostly cloudy with a chance of Showers and Thunderstorms. Near steady temperature in the lower 70s. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 50 percent.

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  • Temperature Real-Time

Lieutenant Island Temperature Statistics

July Temperature

Chatham, Chatham Municipal Airport (14.3 miles)

  • Lowest 13 July, 2026

    59 °F

  • Average July

    72.7 °F

  • Highest 3 July, 2026

    91 °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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