Weather on August 25 at Isle Royale
Isle Royale National Park
Based on 50 years of data from Houghton, MI
Planning Your Visit
August 25th in Isle Royale National Park (via Houghton, MI) typically brings pleasant summer weather, with average highs around 74°F and lows near 56°F. Over 50 years of records, the warmest August 25th was in 1993 (80°F average), while the coldest was 1992 (51°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 30% of August 25th dates historically, with the wettest August 25th recording 2.92" of rain. The last decade has been 3.3°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.3°F cooler on this date compared to 20-30 years ago.
Planning for August 25th 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 | 63°F | 48°F | 0" | -- |
| 2024 | 82°F | 64°F | 0" | -- |
| 2023 | 79°F | 58°F | 0" | -- |
| 2022 | 73°F | 53°F | 0.05" | -- |
| 2021 | 76°F | 58°F | 0" | -- |
| 2020 | 76°F | 61°F | 0" | -- |
| 2019 | 73°F | 50°F | 0" | -- |
| 2018 | 75°F | 59°F | 0.03" | -- |
| 2017 | 66°F | 37°F | 0" | -- |
| 2016 | 75°F | 63°F | 0" | -- |
| 2015 | 57°F | 50°F | 0" | -- |
| 2014 | 86°F | 62°F | 1.57" | -- |
| 2013 | 90°F | 70°F | 0.15" | -- |
| 2012 | 87°F | 67°F | 0" | -- |
| 2011 | 72°F | 53°F | 0" | -- |
| 2010 | 65°F | 51°F | 0" | -- |
| 2009 | 70°F | 53°F | 0.61" | -- |
| 2008 | 73°F | 38°F | 0" | -- |
| 2007 | 69°F | 47°F | 0" | -- |
| 2006 | 61°F | 57°F | 0.05" | -- |
| 2005 | 78°F | 57°F | 0" | -- |
| 2004 | 76°F | 61°F | 0" | -- |
| 2003 | 82°F | 67°F | 0" | 0" |
| 2002 | 78°F | 56°F | 0" | 0" |
| 2001 | 74°F | 60°F | 0" | 0" |
| 2000 | 90°F | 56°F | 0" | 0" |
| 1999 | 80°F | 59°F | 0" | 0" |
| 1998 | 72°F | 60°F | 0" | 0" |
| 1997 | 73°F | 53°F | 0" | 0" |
| 1996 | 71°F | 52°F | 0" | 0" |
| 1995 | 65°F | 53°F | 2.92" | 0" |
| 1994 | 89°F | 59°F | 0" | 0" |
| 1993 | 92°F | 68°F | 0" | 0" |
| 1992 | 54°F | 49°F | 0.99" | 0" |
| 1991 | 85°F | 65°F | 0.56" | 0" |
| 1990 | 78°F | 67°F | 0.33" | 0" |
| 1989 | 74°F | 48°F | 0" | 0" |
| 1988 | 59°F | 55°F | 0.23" | 0" |
| 1983 | 83°F | 63°F | 0" | 0" |
| 1981 | 70°F | 55°F | 0" | 0" |
| 1980 | 79°F | 65°F | 0" | 0" |
| 1979 | 72°F | 53°F | 0" | 0" |
| 1978 | 73°F | 52°F | 0" | 0" |
| 1977 | 73°F | 40°F | 0.15" | 0" |
| 1976 | 84°F | 62°F | 0" | 0" |
| 1975 | 72°F | 60°F | 0.97" | 0" |
| 1974 | 77°F | 56°F | 0.05" | 0" |
| 1973 | 72°F | 58°F | 0" | 0" |
| 1972 | 60°F | 52°F | 0" | 0" |
| 1971 | 56°F | 48°F | 0.41" | 0" |