Weather on August 4 at Isle Royale

Isle Royale National Park

MIMidwest800 ft elevation
Avg High75°F
Avg Low55°F
Warmest198977°F
Coldest197155°F

Based on 50 years of data from Houghton, MI

Planning Your Visit

August 4th in Isle Royale National Park (via Houghton, MI) typically brings pleasant summer weather, with average highs around 75°F and lows near 55°F. Over 50 years of records, the warmest August 4th was in 1989 (77°F average), while the coldest was 1971 (55°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 32% of August 4th dates historically, with the wettest August 4th recording 1.22" of rain. The last decade has been 1.9°F cooler on this date compared to 20-30 years ago.

The last decade has been 1.9°F cooler on this date compared to 20-30 years ago.

Planning for August 4th in Isle Royale? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.

Year by Year History

YearHighLowPrecipSnow
202577°F54°F0"--
202477°F55°F0"--
202375°F55°F0"--
202275°F56°F0"--
202186°F61°F0"--
202065°F46°F0"--
201981°F49°F0"--
201877°F55°F1.04"--
201765°F50°F0.51"--
201687°F66°F0"--
201565°F51°F0.05"--
201471°F51°F0"--
201370°F45°F0"--
201280°F64°F0.23"--
201186°F53°F0"--
201079°F64°F0"--
200968°F52°F0"--
200879°F62°F0.18"--
200781°F47°F0"--
200677°F55°F0"--
200577°F59°F0.1"--
200468°F50°F0"--
200372°F59°F0"0"
200274°F63°F0"0"
200188°F62°F0"0"
200082°F51°F0"0"
199977°F57°F0.53"0"
199881°F61°F0"0"
199768°F53°F0.03"0"
199684°F61°F0"0"
199584°F62°F0.79"0"
199481°F50°F0.23"0"
199367°F50°F0"0"
199269°F52°F0"0"
199166°F50°F0"0"
199074°F58°F0"0"
198987°F66°F0"0"
198874°F66°F1.22"0"
198375°F62°F0"0"
198171°F60°F0.48"0"
198069°F59°F0.43"0"
197980°F57°F0.03"0"
197872°F50°F0"0"
197773°F53°F0"0"
197675°F59°F0.53"0"
197572°F58°F0.13"0"
197470°F51°F0"0"
197382°F55°F0"0"
197270°F41°F0"0"
197170°F41°F0"0"

August 4 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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