Granite Bay State Marine Park Rainfall Forecast

  • 85%
  • 75%
  • 90%
  • 85%
  • 70%
  • 90%
  • 95%
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  • Rainfall Probability Forecast NOAA

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Granite Bay State Marine Park Rainfall Statistics

September Rainfall

Portage, Portage Glacier (25.5 miles)

  • Total Rainfall September

    18.9in

  • Daily Average September

    1.2in

  • Wettest Day 16 September, 2025

    4.5in

  • Wet Days September

    14/19 (74%)

Climate (2010–Present)

Portage, Portage Glacier (25.5 miles)

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  • Annual Average 2020–2024

    92.9in

  • Monthly Average 2020–2025

    9.5in

  • Daily Average 2020–2025

    0.4in

  • Wettest Day 30 October, 2021

    10.3in
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