Weather on October 18 at Isle Royale

Isle Royale National Park

MIMidwest800 ft elevation
Avg High51°F
Avg Low35°F
Warmest199464°F
Coldest197227°F

Based on 50 years of data from Houghton, MI

Planning Your Visit

October 18th in Isle Royale National Park (via Houghton, MI) typically brings cool fall weather, with average highs around 51°F and lows near 35°F. Over 50 years of records, the warmest October 18th was in 1994 (64°F average), while the coldest was 1972 (27°F) — a 37°F range across recorded history. Precipitation has occurred on 48% of recorded October 18th dates, with snow falling 8% of the time (heaviest snowfall: 9.4"). The last decade has been 4.1°F warmer on this date compared to 20-30 years ago.

The last decade has been 4.1°F warmer on this date compared to 20-30 years ago.

Planning for October 18th in Isle Royale? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.

Year by Year History

YearHighLowPrecipSnow
202568°F46°F0"--
202475°F49°F0"--
202357°F40°F0.2"--
202240°F32°F0.03"--
202168°F35°F0"--
202040°F32°F0.1"--
201956°F30°F0"--
201867°F23°F0"--
201775°F45°F0"--
201654°F42°F0.1"--
201548°F20°F0"--
201441°F29°F0.03"--
201345°F30°F0.38"--
201254°F45°F0.97"--
201144°F37°F0.03"--
201048°F33°F0"--
200956°F30°F0"--
200855°F26°F0"--
200757°F50°F1.78"--
200651°F37°F0.08"--
200547°F33°F1.42"--
200438°F31°F0"--
200352°F34°F0.03"--
200239°F25°F0.76"0"
200154°F34°F0.36"0"
200060°F43°F0"0"
199944°F29°F0.05"0"
199874°F43°F0.38"0"
199767°F49°F0"0"
199664°F35°F0"0"
199561°F41°F0"0"
199473°F56°F0.3"0"
199346°F31°F0"0"
199232°F28°F0"0"
199140°F31°F0"0"
199034°F31°F3.25"9.4"
198936°F29°F0.03"0.2"
198841°F34°F0.05"0"
198343°F33°F0"0"
198148°F28°F0.69"0.5"
198042°F34°F0.13"0"
197953°F30°F0.1"0"
197848°F34°F0"0"
197746°F41°F0"0"
197637°F28°F0.38"1.5"
197550°F30°F0"0"
197435°F27°F0"0"
197344°F36°F0"0"
197233°F22°F0"0"
197169°F54°F0"0"

October 18 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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