Castle Rock Weather Forecast

    • 59
    • 62

    Rain Showers

    • 58
    • 61

    Rain Showers

    • 58
    • 62

    Mostly Cloudy

    • 60
    • 65

    Mostly Cloudy

    • 62
    • 70

    Partly Sunny

    • 59
    • 69

    Mostly Cloudy

Today 27 Sep Eastern Essex

Showers with a slight chance of Thunderstorms. Patchy fog. Windy. Near steady temperature in the upper 50s. Northeast Winds 20 to 30 Mph with Gusts up to 55 Mph. Chance of rain near 100 percent.

Tonight 27 Sep Eastern Essex

Showers with a chance of Thunderstorms in the Evening, then Showers after midnight. Patchy fog. Breezy with Lows in the mid 50s. Northeast Winds 15 to 25 Mph. Gusts up to 40 Mph in the evening. Chance of rain near 100 percent.

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Castle Rock Temperature Statistics

September Temperature

Boston, Logan International Airport (6.2 miles)

  • Lowest 24 September, 2026

    48.9 °F

  • Average September

    66.6 °F

  • Highest 10 September, 2026

    87.7 °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

    61 °F
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