Weather on August 9 at Isle Royale
Isle Royale National Park
Based on 50 years of data from Houghton, MI
Planning Your Visit
August 9th in Isle Royale National Park (via Houghton, MI) typically brings pleasant summer weather, with average highs around 77°F and lows near 58°F. Over 50 years of records, the warmest August 9th was in 1971 (79°F average), while the coldest was 1972 (55°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 36% of August 9th dates historically, with the wettest August 9th recording 3.71" 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 August 9th in Isle Royale? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 82°F | 67°F | 0.28" | -- |
| 2024 | 62°F | 53°F | 0.94" | -- |
| 2023 | 75°F | 61°F | 0.13" | -- |
| 2022 | 84°F | 49°F | 0" | -- |
| 2021 | 85°F | 68°F | 0.03" | -- |
| 2020 | 85°F | 64°F | 3.71" | -- |
| 2019 | 71°F | 55°F | 0" | -- |
| 2018 | 84°F | 61°F | 0" | -- |
| 2017 | 74°F | 55°F | 0.18" | -- |
| 2016 | 87°F | 63°F | 0.05" | -- |
| 2015 | 79°F | 63°F | 0.56" | -- |
| 2014 | 83°F | 52°F | 0" | -- |
| 2013 | 66°F | 50°F | 0" | -- |
| 2012 | 64°F | 52°F | 0.79" | -- |
| 2011 | 70°F | 57°F | 0.05" | -- |
| 2010 | 82°F | 63°F | 0" | -- |
| 2009 | 73°F | 57°F | 0.28" | -- |
| 2008 | 66°F | 47°F | 0" | -- |
| 2007 | 80°F | 58°F | 0" | -- |
| 2006 | 79°F | 59°F | 0" | -- |
| 2005 | 80°F | 60°F | 0.43" | -- |
| 2004 | 73°F | 59°F | 1.88" | -- |
| 2003 | 81°F | 58°F | 0" | 0" |
| 2002 | 87°F | 63°F | 0" | 0" |
| 2001 | 81°F | 69°F | 0" | 0" |
| 2000 | 74°F | 60°F | 0.1" | 0" |
| 1999 | 69°F | 47°F | 0" | 0" |
| 1998 | 88°F | 64°F | 0.23" | 0" |
| 1997 | 86°F | 61°F | 0" | 0" |
| 1996 | 74°F | 54°F | 0" | 0" |
| 1995 | 87°F | 66°F | 0.38" | 0" |
| 1994 | 66°F | 44°F | 0" | 0" |
| 1993 | 77°F | 62°F | 0.18" | 0" |
| 1992 | 78°F | 55°F | 0" | 0" |
| 1991 | 74°F | 55°F | 0" | 0" |
| 1990 | 77°F | 59°F | 0" | 0" |
| 1989 | 80°F | 60°F | 0" | 0" |
| 1988 | 74°F | 55°F | 0" | 0" |
| 1983 | 67°F | 51°F | 0" | 0" |
| 1981 | 70°F | 59°F | 0" | 0" |
| 1980 | 73°F | 52°F | 0" | 0" |
| 1979 | 74°F | 50°F | 0.1" | 0" |
| 1978 | 69°F | 52°F | 0" | 0" |
| 1977 | 73°F | 52°F | 0" | 0" |
| 1976 | 84°F | 61°F | 0" | 0" |
| 1975 | 82°F | 62°F | 0" | 0" |
| 1974 | 75°F | 57°F | 0" | 0" |
| 1973 | 80°F | 63°F | 0" | 0" |
| 1972 | 64°F | 47°F | 0" | 0" |
| 1971 | 90°F | 68°F | 0" | 0" |