Weather on October 15 at Isle Royale

Isle Royale National Park

MIMidwest800 ft elevation
Avg High50°F
Avg Low36°F
Warmest201657°F
Coldest199131°F

Based on 50 years of data from Houghton, MI

Planning Your Visit

October 15th in Isle Royale National Park (via Houghton, MI) typically brings cool fall weather, with average highs around 50°F and lows near 36°F. Over 50 years of records, the warmest October 15th was in 2016 (57°F average), while the coldest was 1991 (31°F) — a 26°F range across recorded history. Precipitation has occurred on 42% of recorded October 15th dates, with snow falling 2% of the time. Temperatures on this date have remained relatively stable over the past several decades.

Temperatures on this date have remained relatively stable over the past several decades.

Planning for October 15th in Isle Royale? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.

Year by Year History

YearHighLowPrecipSnow
202560°F39°F0"--
202448°F34°F0"--
202351°F40°F0"--
202243°F31°F0.25"--
202158°F47°F0.05"--
202044°F33°F0.48"--
201946°F31°F0.25"--
201839°F32°F0.08"--
201749°F37°F0.71"--
201665°F50°F0"--
201555°F38°F0.13"--
201458°F37°F0"--
201350°F45°F1.52"--
201246°F29°F0"--
201147°F41°F1.24"--
201055°F37°F0"--
200937°F25°F0"--
200852°F44°F0"--
200752°F36°F0"--
200646°F27°F0"--
200553°F46°F0"--
200441°F36°F0.2"--
200345°F34°F0.3"--
200257°F36°F0.23"0"
200154°F42°F0"0"
200044°F41°F0.61"0"
199955°F40°F0"0"
199851°F28°F0"0"
199747°F32°F0"0"
199670°F38°F0.05"0"
199543°F39°F0.51"0"
199460°F41°F0"0"
199347°F31°F0"0"
199240°F33°F0"0"
199133°F29°F0.1"0.4"
199048°F39°F0"0"
198949°F39°F0"0"
198865°F42°F0"0"
198344°F29°F0.79"0"
198149°F39°F0"0"
198047°F30°F0"0"
197949°F36°F0"0"
197845°F30°F0.08"0"
197743°F35°F0.08"0"
197647°F32°F1.02"0"
197548°F41°F0.13"0"
197447°F33°F0"0"
197353°F43°F0"0"
197248°F30°F0"0"
197153°F40°F0"0"

October 15 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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