Castle Rock Weather Forecast

    • 50
    • 58

    Cloudy

    • 53
    • 53

    Rain Showers

    • 53
    • 61

    Chance Rain Showers

    • 56
    • 69

    Partly Sunny

    • 54
    • 71

    Slight Chance Rain Showers

    • 52
    • 62

    Partly Sunny

Today 23 May Eastern Essex

Mostly cloudy. Highs in the lower 60s. Northeast Winds around 5 Mph, becoming east in the afternoon.

Tonight 23 May Eastern Essex

Mostly cloudy. Near steady temperature around 50. West Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Castle Rock Temperature Statistics

May Temperature

Boston, Logan International Airport (6.2 miles)

  • Lowest 9 May, 2026

    42.7 °F

  • Average May

    60.8 °F

  • Highest 19 May, 2026

    96.1 °F

Climate (2021–Present)

Boston, Logan International Airport (6.2 miles)

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  • Average Low 2021–2026

    46.7 °F

  • Average 2021–2026

    53.6 °F

  • Average High 2021–2026

    61 °F
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