Castle Rock Weather Forecast

    • 27
    • 41

    Decreasing Clouds

    • 8
    • 32

    Breezy

    • 9
    • 15

    Chance Snow

    • 20
    • 26

    Snow

    • 12
    • 26

    Blustery

    • 16
    • 23

    Partly Sunny

Today 22 Jan Eastern Essex

Mostly sunny. Not as cool with Highs in the lower 40s. West Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 22 Jan Eastern Essex

Partly cloudy. Lows in the lower 20s. West Winds 5 to 10 Mph with Gusts up to 20 Mph.

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  • Temperature Real-Time

Castle Rock Temperature Statistics

January Temperature

Boston, Logan International Airport (6.2 miles)

  • Lowest 5 January, 2026

    16 °F

  • Average January

    32.6 °F

  • Highest 9 January, 2026

    52 °F

Climate (2021–Present)

Boston, Logan International Airport (6.2 miles)

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  • Average Low 2021–2026

    46.9 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    61 °F
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