Weather on May 17 at Isle Royale
Isle Royale National Park
Based on 51 years of data from Houghton, MI
Planning Your Visit
May 17th in Isle Royale National Park (via Houghton, MI) typically brings mild spring weather, with average highs around 62°F and lows near 41°F. Over 51 years of records, the warmest May 17th was in 1977 (70°F average), while the coldest was 2002 (35°F) — a 35°F range across recorded history. Rain or other precipitation has occurred on about 31% of May 17th dates historically, with the wettest May 17th recording 3" of rain. The last decade has been 2.5°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.5°F cooler on this date compared to 20-30 years ago.
Planning for May 17th in Isle Royale? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2026 | 54°F | 37°F | -- | -- |
| 2025 | 55°F | 37°F | 0.08" | -- |
| 2024 | 64°F | 46°F | 0" | -- |
| 2023 | 50°F | 34°F | 0" | -- |
| 2022 | 57°F | 39°F | 0" | -- |
| 2021 | 83°F | 47°F | 0" | -- |
| 2020 | 58°F | 44°F | 0" | -- |
| 2019 | 52°F | 35°F | 0" | -- |
| 2018 | 49°F | 38°F | 0" | -- |
| 2017 | 62°F | 47°F | 2.69" | -- |
| 2016 | 59°F | 34°F | 0" | -- |
| 2015 | 72°F | 45°F | 0.03" | -- |
| 2014 | 58°F | 31°F | 0" | -- |
| 2013 | 57°F | 39°F | 0" | -- |
| 2012 | 65°F | 35°F | 0" | -- |
| 2011 | 58°F | 31°F | 0" | -- |
| 2010 | 74°F | 42°F | 0" | -- |
| 2009 | 56°F | 35°F | 0" | -- |
| 2008 | 60°F | 38°F | 0.15" | -- |
| 2007 | 63°F | 35°F | 0" | -- |
| 2006 | 57°F | 44°F | 0.2" | -- |
| 2005 | 49°F | 34°F | 0" | -- |
| 2004 | 57°F | 38°F | 0.56" | -- |
| 2003 | 64°F | 42°F | 0" | 0" |
| 2002 | 40°F | 30°F | 0" | 0" |
| 2001 | 79°F | 46°F | 0" | 0" |
| 2000 | 69°F | 41°F | 0" | 0" |
| 1999 | 68°F | 55°F | 0.28" | 0" |
| 1998 | 77°F | 57°F | 0" | 0" |
| 1997 | 56°F | 32°F | 0.13" | 0" |
| 1996 | 58°F | 38°F | 0.08" | 0" |
| 1995 | 70°F | 37°F | 0.3" | 0" |
| 1994 | 55°F | 32°F | 0" | 0" |
| 1993 | 58°F | 35°F | 0.43" | 0" |
| 1992 | 63°F | 41°F | 0.58" | 0" |
| 1991 | 51°F | 41°F | 0" | 0" |
| 1990 | 51°F | 41°F | 0.66" | 0" |
| 1989 | 78°F | 54°F | 0" | 0" |
| 1988 | 56°F | 33°F | 0" | 0" |
| 1982 | 61°F | 42°F | 0.03" | 0" |
| 1981 | 48°F | 34°F | 0" | 0" |
| 1980 | 64°F | 44°F | 0" | 0" |
| 1979 | 80°F | 51°F | 0" | 0" |
| 1978 | 71°F | 51°F | 0" | 0" |
| 1977 | 82°F | 57°F | 3" | 0" |
| 1976 | 53°F | 41°F | 0" | 0" |
| 1975 | 83°F | 46°F | 0" | 0" |
| 1974 | 56°F | 44°F | 0" | 0" |
| 1973 | 59°F | 33°F | 0" | 0" |
| 1972 | 85°F | 48°F | 0" | 0" |
| 1971 | 67°F | 39°F | 0.13" | 0" |