Castle Rock Rainfall Forecast

  • 15%
  • 20%
  • 70%
  • 40%
  • 15%
  • 30%
  • 45%
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  • Rainfall Probability Forecast NOAA

  • Rain Today Real-Time

Castle Rock Rainfall Statistics

May Rainfall

Boston, Logan International Airport (6.2 miles)

  • Total Rainfall May

    0.8in

  • Daily Average May

    0.1in

  • Wettest Day 9 May, 2026

    0.4in

  • Wet Days May

    5/18 (28%)

Climate (2010–Present)

Boston, Logan International Airport (6.2 miles)

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  • Annual Average 2021–2025

    43.1in

  • Monthly Average 2021–2026

    3.5in

  • Daily Average 2021–2026

    0.1in

  • Wettest Day 22 May, 2025

    3.1in
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