Isle Royale National Park Rainfall Forecast

  • 50%
  • 30%
  • 35%
  • 85%
  • 55%
  • 45%
  • 20%
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  • Rainfall Probability Forecast NOAA

  • Rain Today Real-Time

Isle Royale National Park Rainfall Statistics

December Rainfall

Copper Harbor (60.3 miles)

  • Total Rainfall December

    0.9in

  • Daily Average December

    0.04in

  • Wettest Day 20 December, 2025

    0.3in

  • Wet Days December

    13/23 (57%)

Climate (2010–Present)

Copper Harbor (60.3 miles)

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  • Annual Average 2020–2024

    26.8in

  • Monthly Average 2020–2025

    2.3in

  • Daily Average 2020–2025

    0.1in

  • Wettest Day 23 July, 2021

    2.7in
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