Cohasset Weather Forecast

    • 60
    • 75

    Mostly Sunny

    • 67
    • 82

    Mostly Sunny

    • 72
    • 88

    Mostly Sunny

    • 70
    • 93

    Slight Chance Rain Showers

    • 66
    • 82

    Slight Chance Rain Showers

    • 67
    • 81

    Slight Chance Rain Showers

Today 22 Jul Eastern Plymouth

Sunny. Highs in the mid 70s. North Winds 5 to 10 Mph, becoming east this afternoon.

Tonight 22 Jul Eastern Plymouth

Mostly clear. Lows in the upper 50s. South Winds 5 to 10 Mph, becoming southwest after midnight.

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Cohasset Temperature Statistics

July Temperature

Marshfield Airport (11.8 miles)

  • Lowest 5 July, 2025

    55.4 °F

  • Average July

    74.3 °F

  • Highest 1 July, 2025

    89.6 °F

Climate (2020–Present)

Marshfield Airport (11.8 miles)

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  • Average Low 2020–2025

    44.8 °F

  • Average 2020–2025

    53 °F

  • Average High 2020–2025

    60.8 °F
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