Weather on November 20 at Isle Royale

Isle Royale National Park

MIMidwest800 ft elevation
Avg High35°F
Avg Low26°F
Warmest202442°F
Coldest197814°F

Based on 49 years of data from Houghton, MI

Planning Your Visit

November 20th in Isle Royale National Park (via Houghton, MI) typically brings cold fall weather, with average highs around 35°F and lows near 26°F. Over 49 years of records, the warmest November 20th was in 2024 (42°F average), while the coldest was 1978 (14°F) — a 28°F range across recorded history. Precipitation has occurred on 51% of recorded November 20th dates, with snow falling 29% of the time (heaviest snowfall: 8"). The last decade has been 1.0°F cooler on this date compared to 20-30 years ago.

The last decade has been 1.0°F cooler on this date compared to 20-30 years ago.

Planning for November 20th in Isle Royale? Bundle up with warm layers and protect extremities from the cold. Consider bringing rain gear or an umbrella. Check road conditions if traveling, as snow is possible.

Year by Year History

YearHighLowPrecipSnow
202543°F37°F0.3"--
202447°F38°F0.05"--
202340°F29°F0"--
202223°F13°F0"--
202139°F23°F0"--
202036°F29°F0"--
201938°F33°F0.03"--
201824°F14°F0.03"--
201741°F18°F0"--
201624°F21°F0"--
201529°F27°F0.38"--
201418°F9°F0"--
201339°F32°F0.15"--
201247°F34°F0.05"--
201126°F14°F0"--
201025°F18°F0"--
200947°F36°F0"--
200824°F15°F0.13"--
200739°F34°F0"--
200636°F21°F0"--
200534°F31°F0"--
200441°F35°F0.1"--
200352°F29°F0"--
200237°F32°F0.15"0.3"
200137°F30°F0"0"
200029°F21°F1.73"8"
199941°F25°F0.05"0"
199832°F26°F0.84"2.3"
199730°F22°F0"0"
199627°F22°F0"0"
199538°F25°F0"0"
199440°F22°F0"0"
199329°F20°F0"0"
199237°F32°F2.08"2.3"
199138°F31°F0"0"
199046°F28°F0.58"0"
198944°F18°F0"0.1"
198836°F27°F0"0"
198128°F25°F0.69"2.7"
198043°F31°F0.15"0.6"
197942°F32°F0"0"
197818°F10°F0.69"6.1"
197745°F31°F1.75"6.3"
197630°F23°F0.05"0.3"
197532°F26°F1.88"6.5"
197437°F28°F1.19"4.2"
197342°F32°F0.18"0"
197234°F28°F0.18"0.7"
197132°F25°F0.74"3.8"

November 20 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

Back to Isle Royale