Castle Rock Weather Forecast

    • 55
    • 60

    Chance Rain Showers

    • 47
    • 65

    Partly Sunny

    • 46
    • 57

    Sunny

    • 54
    • 61

    Mostly Sunny

    • 54
    • 65

    Mostly Sunny

    • 54
    • 64

    Mostly Sunny

Today 4 Oct Eastern Essex

Sunny in the Morning, then becoming partly sunny. Highs in the lower 60s. East Winds 5 to 10 Mph.

Tonight 4 Oct Eastern Essex

Mostly cloudy with a 40 percent chance of Showers. Lows in the lower 50s. East Winds 5 to 10 Mph, becoming north after midnight.

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Castle Rock Temperature Statistics

October Temperature

Boston, Logan International Airport (6.2 miles)

  • Lowest 1 October, 2026

    60.1 °F

  • Average October

    67.2 °F

  • Highest 1 October, 2026

    77 °F

Climate (2021–2026)

Boston, Logan International Airport (6.2 miles)

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  • Average Low 2021–2026

    46.6 °F

  • Average 2021–2026

    53.6 °F

  • Average High 2021–2026

    60.9 °F
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