Weather on August 5 at Isle Royale
Isle Royale National Park
MIMidwest800 ft elevation
Avg High76°F
Avg Low55°F
Warmest200181°F
Coldest199054°F
Based on 51 years of data from Houghton, MI
Planning Your Visit
August 5th in Isle Royale National Park (via Houghton, MI) typically brings pleasant summer weather, with average highs around 76°F and lows near 55°F. Over 51 years of records, the warmest August 5th was in 2001 (81°F average), while the coldest was 1990 (54°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 20% of August 5th dates historically, with the wettest August 5th recording 0.73" of rain. The last decade has been 1.3°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.3°F cooler on this date compared to 20-30 years ago.
Planning for August 5th in Isle Royale? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2026 | 73°F | 52°F | 0" | -- |
| 2025 | 78°F | 62°F | 0" | -- |
| 2024 | 74°F | 53°F | 0" | -- |
| 2023 | 77°F | 52°F | 0" | -- |
| 2022 | 86°F | 54°F | 0" | -- |
| 2021 | 79°F | 65°F | 0.06" | -- |
| 2020 | 75°F | 47°F | 0" | -- |
| 2019 | 78°F | 62°F | 0.73" | -- |
| 2018 | 85°F | 68°F | 0" | -- |
| 2017 | 74°F | 50°F | 0" | -- |
| 2016 | 75°F | 64°F | 0" | -- |
| 2015 | 72°F | 50°F | 0" | -- |
| 2014 | 76°F | 47°F | 0" | -- |
| 2013 | 67°F | 45°F | 0" | -- |
| 2012 | 70°F | 56°F | 0.01" | -- |
| 2011 | 86°F | 64°F | 0" | -- |
| 2010 | 72°F | 55°F | 0" | -- |
| 2009 | 68°F | 48°F | 0" | -- |
| 2008 | 78°F | 58°F | 0" | -- |
| 2007 | 77°F | 54°F | 0" | -- |
| 2006 | 79°F | 57°F | 0" | -- |
| 2005 | 76°F | 54°F | 0" | -- |
| 2004 | 69°F | 51°F | 0" | -- |
| 2003 | 78°F | 61°F | 0" | 0" |
| 2002 | 75°F | 60°F | 0" | 0" |
| 2001 | 94°F | 69°F | 0" | 0" |
| 2000 | 82°F | 55°F | 0" | 0" |
| 1999 | 76°F | 50°F | 0" | 0" |
| 1998 | 80°F | 59°F | 0" | 0" |
| 1997 | 78°F | 52°F | 0" | 0" |
| 1996 | 84°F | 68°F | 0.6" | 0" |
| 1995 | 77°F | 61°F | 0.01" | 0" |
| 1994 | 70°F | 47°F | 0" | 0" |
| 1993 | 70°F | 52°F | 0.48" | 0" |
| 1992 | 75°F | 52°F | 0" | 0" |
| 1991 | 72°F | 50°F | 0" | 0" |
| 1990 | 60°F | 49°F | 0" | 0" |
| 1989 | 80°F | 47°F | 0.08" | 0" |
| 1988 | 68°F | 61°F | 0.01" | 0" |
| 1983 | 86°F | 60°F | 0" | 0" |
| 1981 | 78°F | 59°F | 0" | 0" |
| 1980 | 75°F | 60°F | 0" | 0" |
| 1979 | 70°F | 53°F | 0" | 0" |
| 1978 | 82°F | 55°F | 0" | 0" |
| 1977 | 70°F | 56°F | 0" | 0" |
| 1976 | 64°F | 48°F | 0" | 0" |
| 1975 | 66°F | 50°F | 0.02" | 0" |
| 1974 | 75°F | 54°F | 0" | 0" |
| 1973 | 80°F | 66°F | 0" | 0" |
| 1972 | 77°F | 51°F | 0.38" | 0" |
| 1971 | 74°F | 44°F | 0" | 0" |
August 5 at Nearby Parks
Holiday Weather at Isle Royale
Official NPS WebsiteVisit nps.gov/isro for park information, alerts, and reservations
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