Weather on October 31 at Isle Royale

Isle Royale National Park

MIMidwest800 ft elevation
Avg High47°F
Avg Low34°F
Warmest200054°F
Coldest199625°F

Based on 50 years of data from Houghton, MI

Planning Your Visit

October 31st in Isle Royale National Park (via Houghton, MI) typically brings chilly fall weather, with average highs around 47°F and lows near 34°F. Over 50 years of records, the warmest October 31st was in 2000 (54°F average), while the coldest was 1996 (25°F) — a 29°F range across recorded history. Precipitation has occurred on 58% of recorded October 31st dates, with snow falling 12% of the time (heaviest snowfall: 2.9"). The last decade has been 3.5°F cooler on this date compared to 20-30 years ago.

The last decade has been 3.5°F cooler on this date compared to 20-30 years ago.

Planning for October 31st in Isle Royale? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.

Year by Year History

YearHighLowPrecipSnow
202547°F38°F0.05"--
202444°F34°F1.37"--
202335°F17°F0"--
202261°F32°F0"--
202149°F37°F0.1"--
202052°F30°F0"--
201932°F28°F0"--
201845°F36°F0"--
201734°F27°F0.36"--
201654°F36°F0"--
201546°F41°F1.32"--
201433°F21°F0.1"--
201349°F43°F0.81"--
201235°F30°F0.08"--
201146°F41°F0.03"--
201044°F27°F0"--
200946°F35°F0.84"--
200859°F28°F0"--
200759°F36°F0.33"--
200648°F29°F0.03"--
200550°F43°F0.76"--
200440°F34°F0.03"--
200342°F35°F0.03"--
200231°F26°F0"0"
200153°F38°F0.41"0"
200063°F45°F0"0"
199964°F34°F0"0"
199852°F45°F0.15"0"
199752°F42°F0.25"0"
199633°F18°F0.53"2.9"
199540°F29°F0.03"0.4"
199451°F31°F0"0"
199332°F23°F0.03"0.1"
199242°F27°F0"0"
199133°F30°F0.48"0.3"
199056°F34°F0"0"
198937°F31°F0.97"2.6"
198838°F33°F0.41"1.6"
198357°F33°F0"0"
198157°F43°F0"0"
198044°F35°F0"0"
197957°F43°F0.79"0"
197850°F34°F0"0"
197752°F45°F0.53"0"
197642°F28°F0"0"
197553°F41°F0"0"
197456°F45°F1.12"0"
197341°F38°F1.12"0"
197241°F31°F0"0"
197158°F34°F0.03"0"

October 31 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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