Weather on June 15 at Isle Royale
Isle Royale National Park
Based on 50 years of data from Houghton, MI
Planning Your Visit
June 15th in Isle Royale National Park (via Houghton, MI) typically brings pleasant summer weather, with average highs around 71°F and lows near 50°F. Over 50 years of records, the warmest June 15th was in 2001 (76°F average), while the coldest was 1974 (49°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 46% of June 15th dates historically, with the wettest June 15th recording 3.61" of rain. The last decade has been 1.8°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.8°F cooler on this date compared to 20-30 years ago.
Planning for June 15th 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 | 70°F | 46°F | 0" | -- |
| 2024 | 77°F | 48°F | 0" | -- |
| 2023 | 57°F | 45°F | 0" | -- |
| 2022 | 74°F | 57°F | 0.3" | -- |
| 2021 | 71°F | 48°F | 0" | -- |
| 2020 | 77°F | 43°F | 0" | -- |
| 2019 | 63°F | 44°F | 0" | -- |
| 2018 | 68°F | 54°F | 1.02" | -- |
| 2017 | 84°F | 58°F | 1.7" | -- |
| 2016 | 59°F | 49°F | 2.59" | -- |
| 2015 | 75°F | 50°F | 0" | -- |
| 2014 | 68°F | 46°F | 0.66" | -- |
| 2013 | 66°F | 48°F | 0.08" | -- |
| 2012 | 78°F | 57°F | 0.23" | -- |
| 2011 | 69°F | 49°F | 0" | -- |
| 2010 | 64°F | 53°F | 0" | -- |
| 2009 | 72°F | 43°F | 0" | -- |
| 2008 | 65°F | 49°F | 0.36" | -- |
| 2007 | 90°F | 57°F | 0" | -- |
| 2006 | 74°F | 47°F | 0" | -- |
| 2005 | 65°F | 50°F | 0.46" | -- |
| 2004 | 60°F | 44°F | 0" | -- |
| 2003 | 72°F | 49°F | 0" | 0" |
| 2002 | 66°F | 50°F | 1.04" | 0" |
| 2001 | 88°F | 64°F | 0.03" | 0" |
| 2000 | 77°F | 53°F | 0.13" | 0" |
| 1999 | 60°F | 41°F | 0" | 0" |
| 1998 | 77°F | 53°F | 0.03" | 0" |
| 1997 | 76°F | 51°F | 1.07" | 0" |
| 1996 | 80°F | 54°F | 0" | 0" |
| 1995 | 87°F | 50°F | 0" | 0" |
| 1994 | 85°F | 63°F | 0" | 0" |
| 1993 | 62°F | 45°F | 0" | 0" |
| 1992 | 63°F | 44°F | 0.53" | 0" |
| 1991 | 76°F | 57°F | 0.1" | 0" |
| 1990 | 65°F | 50°F | 0" | 0" |
| 1989 | 64°F | 37°F | 0" | 0" |
| 1988 | 74°F | 51°F | 0" | 0" |
| 1983 | 78°F | 54°F | 1.04" | 0" |
| 1981 | 68°F | 60°F | 0.15" | 0" |
| 1980 | 58°F | 40°F | 0" | 0" |
| 1979 | 80°F | 62°F | 1.22" | 0" |
| 1978 | 66°F | 49°F | 0.1" | 0" |
| 1977 | 67°F | 50°F | 0" | 0" |
| 1976 | 69°F | 50°F | 2.11" | 0" |
| 1975 | 54°F | 45°F | 3.61" | 0" |
| 1974 | 54°F | 44°F | 0.08" | 0" |
| 1973 | 86°F | 53°F | 0" | 0" |
| 1972 | 57°F | 45°F | 0" | 0" |
| 1971 | 76°F | 51°F | 0" | 0" |