Weather on August 3 at Isle Royale
Isle Royale National Park
MIMidwest800 ft elevation
Avg High75°F
Avg Low56°F
Warmest198978°F
Coldest201752°F
Based on 50 years of data from Houghton, MI
Planning Your Visit
August 3rd in Isle Royale National Park (via Houghton, MI) typically brings pleasant summer weather, with average highs around 75°F and lows near 56°F. Over 50 years of records, the warmest August 3rd was in 1989 (78°F average), while the coldest was 2017 (52°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 18% of August 3rd dates historically, with the wettest August 3rd recording 2.21" of rain. The last decade has been 1.7°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.7°F cooler on this date compared to 20-30 years ago.
Planning for August 3rd in Isle Royale? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 78°F | 56°F | 0" | -- |
| 2024 | 82°F | 57°F | 0" | -- |
| 2023 | 80°F | 63°F | 0" | -- |
| 2022 | 82°F | 60°F | 0" | -- |
| 2021 | 81°F | 61°F | 0.08" | -- |
| 2020 | 67°F | 50°F | 0" | -- |
| 2019 | 74°F | 52°F | 0" | -- |
| 2018 | 71°F | 42°F | 0" | -- |
| 2017 | 59°F | 45°F | 2.21" | -- |
| 2016 | 87°F | 62°F | 0" | -- |
| 2015 | 66°F | 55°F | 0.08" | -- |
| 2014 | 73°F | 54°F | 0" | -- |
| 2013 | 66°F | 49°F | 0" | -- |
| 2012 | 73°F | 57°F | 0" | -- |
| 2011 | 83°F | 58°F | 0" | -- |
| 2010 | 86°F | 67°F | 0" | -- |
| 2009 | 73°F | 53°F | 0" | -- |
| 2008 | 82°F | 54°F | 0" | -- |
| 2007 | 73°F | 49°F | 0" | -- |
| 2006 | 80°F | 60°F | 0" | -- |
| 2005 | 86°F | 67°F | 0" | -- |
| 2004 | 77°F | 50°F | 0" | -- |
| 2003 | 68°F | 57°F | 0" | -- |
| 2002 | 73°F | 54°F | 0" | 0" |
| 2001 | 85°F | 59°F | 0" | 0" |
| 2000 | 76°F | 47°F | 0" | 0" |
| 1999 | 76°F | 57°F | 0" | 0" |
| 1998 | 79°F | -- | 0" | 0" |
| 1997 | 86°F | 55°F | 0" | 0" |
| 1996 | 83°F | 55°F | 0" | 0" |
| 1995 | 83°F | 62°F | 0" | 0" |
| 1994 | 81°F | 59°F | 0" | 0" |
| 1993 | 57°F | 50°F | 0.03" | 0" |
| 1992 | 62°F | 51°F | 0" | 0" |
| 1991 | 65°F | 53°F | 0" | 0" |
| 1990 | 86°F | 65°F | 0" | 0" |
| 1989 | 87°F | 69°F | 0" | 0" |
| 1988 | 83°F | 66°F | 1.35" | 0" |
| 1983 | 71°F | 62°F | 1.4" | 0" |
| 1981 | 75°F | 60°F | 0.41" | 0" |
| 1980 | 74°F | 53°F | 0" | 0" |
| 1979 | 75°F | 58°F | 0" | 0" |
| 1978 | 63°F | 51°F | 0" | 0" |
| 1977 | 67°F | 52°F | 1.78" | 0" |
| 1976 | 83°F | 59°F | 0" | 0" |
| 1975 | 78°F | 59°F | 0" | 0" |
| 1974 | 58°F | 50°F | 1.52" | 0" |
| 1973 | 76°F | 53°F | 0" | 0" |
| 1972 | 61°F | 46°F | 0" | 0" |
| 1971 | 66°F | 47°F | 0" | 0" |
August 3 at Nearby Parks
Holiday Weather at Isle Royale
Official NPS WebsiteVisit nps.gov/isro for park information, alerts, and reservations
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