Hammonasset Beach State Park Weather Forecast

    • 27
    • 41

    Chance Snow

    • 24
    • 41

    Mostly Cloudy

    • 16
    • 32

    Partly Sunny

    • 32
    • 39

    Mostly Cloudy

    • 35
    • 47

    Chance Rain

    • 26
    • 43

    Chance Rain/Snow

Today 6 Dec Southern New Haven

Mostly cloudy. A chance of Snow, freezing drizzle with a slight chance of drizzle this Morning, then a slight chance of drizzle this afternoon. Highs around 40. North Winds around 5 Mph, becoming west around 5 Mph this afternoon. Chance of precipitation 30 percent.

Tonight 6 Dec Southern New Haven

Partly cloudy in the Evening, then clearing. Lows in the mid 20s. Northwest Winds around 5 Mph.

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Hammonasset Beach State Park Temperature Statistics

December Temperature

Chester, Chester Airport (8.1 miles)

  • Lowest 4 December, 2025

    17.6 °F

  • Average December

    32.9 °F

  • Highest 1 December, 2025

    42.8 °F

Climate (2020–Present)

Chester, Chester Airport (8.1 miles)

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  • Average Low 2020–2025

    45.3 °F

  • Average 2020–2025

    53.6 °F

  • Average High 2020–2025

    62.6 °F
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