Dater Mountain Nature Park Weather Forecast

    • 14
    • 26

    Decreasing Clouds

    • 20
    • 30

    Partly Sunny

    • 23
    • 42

    Partly Sunny

    • 37
    • 47

    Rain

    • 21
    • 50

    Partly Sunny

    • 28
    • 35

    Chance Rain

    • 24
    • 43

    Slight Chance Rain

Today 15 Dec Rockland

Mostly cloudy and cold. Near steady temperature in the mid 20s. West Winds 5 to 10 Mph with Gusts up to 25 Mph.

Tonight 15 Dec Rockland

Mostly cloudy. Lows around 16. Southwest Winds around 5 Mph.

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Dater Mountain Nature Park Temperature Statistics

December Temperature

Caldwell, Essex County Airport (21.1 miles)

  • Lowest 9 December, 2025

    12.9 °F

  • Average December

    31.1 °F

  • Highest 10 December, 2025

    44.1 °F

Climate (2020–Present)

Caldwell, Essex County Airport (21.1 miles)

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  • Average Low 2020–2025

    47 °F

  • Average 2020–2025

    56.2 °F

  • Average High 2020–2025

    65.4 °F
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