Castle Rock Weather Forecast

    • 63
    • 73

    Mostly Sunny

    • 67
    • 76

    Rain Showers

    • 66
    • 71

    Chance Rain Showers

    • 66
    • 74

    Mostly Sunny

    • 69
    • 78

    Slight Chance Thunderstorms

    • 65
    • 78

    Chance Rain Showers

Today 15 Aug Eastern Essex

Sunny. Highs in the upper 70s. North Winds 5 to 10 Mph, becoming east this afternoon.

Tonight 15 Aug Eastern Essex

Mostly clear. Lows in the upper 50s. Southwest Winds around 5 Mph, becoming northwest after midnight.

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Castle Rock Temperature Statistics

August Temperature

Boston, Logan International Airport (6.2 miles)

  • Lowest 4 August, 2026

    66.7 °F

  • Average August

    79.6 °F

  • Highest 7 August, 2026

    94.6 °F

Climate (2021–2026)

Boston, Logan International Airport (6.2 miles)

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  • Average Low 2021–2026

    46.7 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    61 °F
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