Castle Rock Weather Forecast

    • 71
    • 80

    Slight Chance Thunderstorms

    • 69
    • 84

    Mostly Sunny

    • 70
    • 80

    Mostly Sunny

    • 68
    • 85

    Slight Chance Thunderstorms

    • 67
    • 76

    Partly Sunny

    • 65
    • 77

    Slight Chance Thunderstorms

Today 8 Aug Eastern Essex

Partly sunny. A slight chance of Showers and Thunderstorms this afternoon. Highs in the mid 80s. West Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 8 Aug Eastern Essex

Partly cloudy with a slight chance of Showers and Thunderstorms in the Evening, then mostly clear after midnight. Humid with Lows in the lower 70s. West Winds around 5 Mph. Chance of rain 20 percent.

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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

    78 °F

  • Highest 5 August, 2026

    88.6 °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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