Castle Rock Weather Forecast

    • 19
    • 26

    Becoming Sunny

    • 31
    • 33

    Chance Snow

    • 37
    • 46

    Rain Likely

    • 27
    • 40

    Partly Sunny

    • 28
    • 33

    Chance Snow

    • 25
    • 35

    Chance Snow

    • 21
    • 29

    Mostly Sunny

Today 8 Dec Eastern Essex

Sunny, Colder. Near steady temperature in the lower 20s. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 8 Dec Eastern Essex

Mostly clear. Colder with Lows 7 to 13 above. Northwest Winds 5 to 10 Mph. Gusts up to 20 Mph this evening.

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Castle Rock Temperature Statistics

December Temperature

Boston, Logan International Airport (6.2 miles)

  • Lowest 5 December, 2025

    12 °F

  • Average December

    32.2 °F

  • Highest 1 December, 2025

    43 °F

Climate (2020–Present)

Boston, Logan International Airport (6.2 miles)

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  • Average Low 2020–2025

    47 °F

  • Average 2020–2025

    53.8 °F

  • Average High 2020–2025

    61 °F
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