Weather on May 9 at Isle Royale

Isle Royale National Park

MIMidwest800 ft elevation
Avg High57°F
Avg Low37°F
Warmest199371°F
Coldest200934°F

Based on 50 years of data from Houghton, MI

Planning Your Visit

May 9th in Isle Royale National Park (via Houghton, MI) typically brings cool spring weather, with average highs around 57°F and lows near 37°F. Over 50 years of records, the warmest May 9th was in 1993 (71°F average), while the coldest was 2009 (34°F) — a 37°F range across recorded history. Rain or other precipitation has occurred on about 36% of May 9th dates historically, with the wettest May 9th recording 1.85" of rain. The last decade has been 2.4°F cooler on this date compared to 20-30 years ago.

The last decade has been 2.4°F cooler on this date compared to 20-30 years ago.

Planning for May 9th in Isle Royale? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.

Year by Year History

YearHighLowPrecipSnow
202580°F29°F0"--
202455°F35°F0"--
202369°F42°F0"--
202276°F49°F0"--
202147°F31°F0"--
202048°F23°F0"--
201938°F33°F1.45"--
201854°F41°F0.38"--
201752°F29°F0"--
201654°F33°F0"--
201551°F38°F0"--
201469°F39°F0.33"--
201348°F37°F0.13"--
201258°F35°F0"--
201165°F43°F0.61"--
201050°F23°F0"--
200936°F32°F0"--
200850°F32°F0"--
200776°F52°F0"--
200659°F50°F1.57"--
200575°F54°F0.33"--
200463°F36°F0"--
200343°F37°F0.86"--
200246°F33°F1.45"0"
200170°F35°F0"0"
200057°F41°F0"0"
199958°F30°F0"0"
199861°F41°F0"0"
199755°F33°F1.24"0"
199663°F37°F0"0"
199554°F37°F1.5"0"
199458°F40°F0.15"0"
199387°F55°F0.05"0"
199258°F43°F0"0"
199159°F35°F0"0"
199041°F35°F0"0"
198956°F36°F0"0"
198866°F40°F0.28"0"
198252°F37°F0"0"
198150°F25°F0.05"0"
198051°F37°F0"0"
197943°F36°F1.85"0"
197845°F40°F0.53"0"
197751°F30°F0"0"
197671°F44°F0"0"
197569°F44°F0"0"
197456°F37°F0"0"
197360°F44°F0.33"0"
197255°F31°F0"0"
197162°F32°F0"0"

May 9 at Nearby Parks

Holiday Weather at Isle Royale

Official NPS WebsiteVisit nps.gov/isro for park information, alerts, and reservations

Explore More at Isle Royale

See historical weather for other dates

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May 9 Weather at Isle Royale National Park - Historical Data