Weather on July 31 at Isle Royale

Isle Royale National Park

MIMidwest800 ft elevation
Avg High78°F
Avg Low57°F
Warmest199981°F
Coldest197357°F

Based on 50 years of data from Houghton, MI

Planning Your Visit

July 31st in Isle Royale National Park (via Houghton, MI) typically brings pleasant summer weather, with average highs around 78°F and lows near 57°F. Over 50 years of records, the warmest July 31st was in 1999 (81°F average), while the coldest was 1973 (57°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 34% of July 31st dates historically, with the wettest July 31st recording 3.53" of rain. 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 July 31st in Isle Royale? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.

Year by Year History

YearHighLowPrecipSnow
202573°F50°F0"--
202487°F61°F0"--
202373°F55°F0"--
202286°F59°F0.08"--
202175°F56°F0.18"--
202080°F56°F0"--
201975°F50°F0"--
201884°F55°F0"--
201787°F63°F0"--
201679°F54°F0"--
201573°F57°F0"--
201473°F55°F0"--
201373°F56°F0"--
201275°F58°F0"--
201181°F62°F0"--
201074°F60°F0"--
200974°F50°F0"--
200873°F55°F0"--
200790°F69°F0"--
200696°F66°F0"--
200582°F61°F0.03"--
200469°F53°F0.23"--
200372°F55°F0.89"--
200286°F63°F2.36"0"
200178°F62°F0"0"
200087°F56°F0"0"
199996°F66°F0.81"0"
199878°F55°F0"0"
199781°F62°F0"0"
199665°F51°F0.46"0"
199598°F60°F0.2"0"
199484°F61°F0.84"0"
199381°F55°F0.08"0"
199276°F52°F0"0"
199174°F62°F0"0"
199073°F54°F0"0"
198974°F60°F0.2"0"
198880°F56°F0.08"0"
198373°F61°F2.36"0"
198186°F62°F0.36"0"
198079°F62°F0"0"
197966°F53°F0.15"0"
197868°F51°F0"0"
197769°F56°F0"0"
197669°F50°F0"0"
197592°F69°F0"0"
197469°F54°F0"0"
197364°F50°F3.53"0"
197277°F59°F0"0"
197173°F42°F0"0"

July 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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