Weather on May 23 at Isle Royale
Isle Royale National Park
Based on 50 years of data from Houghton, MI
Planning Your Visit
May 23rd in Isle Royale National Park (via Houghton, MI) typically brings mild spring weather, with average highs around 66°F and lows near 45°F. Over 50 years of records, the warmest May 23rd was in 1991 (77°F average), while the coldest was 1992 (39°F) — a 38°F range across recorded history. Rain or other precipitation has occurred on about 38% of May 23rd dates historically, with the wettest May 23rd recording 2.41" of rain. The last decade has been 4.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.3°F warmer on this date compared to 20-30 years ago.
Planning for May 23rd 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 | 53°F | 41°F | 0" | -- |
| 2024 | 63°F | 43°F | 0" | -- |
| 2023 | 79°F | 48°F | 0.18" | -- |
| 2022 | 64°F | 32°F | 0" | -- |
| 2021 | 48°F | 39°F | 0.18" | -- |
| 2020 | 72°F | 50°F | 0" | -- |
| 2019 | 57°F | 45°F | 0.03" | -- |
| 2018 | 80°F | 48°F | 0" | -- |
| 2017 | 57°F | 40°F | 0" | -- |
| 2016 | 87°F | 57°F | 0.03" | -- |
| 2015 | 77°F | 43°F | 0" | -- |
| 2014 | 68°F | 42°F | 0" | -- |
| 2013 | 49°F | 33°F | 0" | -- |
| 2012 | 78°F | 49°F | 0" | -- |
| 2011 | 64°F | 40°F | 0.03" | -- |
| 2010 | 87°F | 55°F | 0" | -- |
| 2009 | 56°F | 40°F | 0" | -- |
| 2008 | 59°F | 42°F | 0" | -- |
| 2007 | 81°F | 61°F | 0" | -- |
| 2006 | 71°F | 36°F | 0" | -- |
| 2005 | 64°F | 46°F | 0.03" | -- |
| 2004 | 49°F | 39°F | 0.18" | -- |
| 2003 | 63°F | 37°F | 0" | 0" |
| 2002 | 78°F | 37°F | 0" | -- |
| 2001 | 55°F | 40°F | 0.46" | 0" |
| 2000 | 73°F | 47°F | 0.15" | 0" |
| 1999 | 50°F | 40°F | 2.41" | 0" |
| 1998 | 69°F | 38°F | 0" | 0" |
| 1997 | 56°F | 40°F | 0.08" | 0" |
| 1996 | 57°F | 40°F | 0" | 0" |
| 1995 | 55°F | 44°F | 0.64" | 0" |
| 1994 | 75°F | 48°F | 0" | 0" |
| 1993 | 62°F | 48°F | 0.36" | 0" |
| 1992 | 44°F | 33°F | 0" | 0" |
| 1991 | 87°F | 67°F | 0" | 0" |
| 1990 | 61°F | 45°F | 0" | 0" |
| 1989 | 70°F | 50°F | 0.46" | 0" |
| 1988 | 73°F | 46°F | 0" | 0" |
| 1982 | 68°F | 40°F | 0" | 0" |
| 1981 | 68°F | 54°F | 0.97" | 0" |
| 1980 | 84°F | 61°F | 0" | 0" |
| 1979 | 52°F | 39°F | 0.1" | 0" |
| 1978 | 71°F | 47°F | 0" | 0" |
| 1977 | 72°F | 57°F | 0.18" | 0" |
| 1976 | 56°F | 38°F | 0" | 0" |
| 1975 | 78°F | 55°F | 0" | 0" |
| 1974 | 57°F | 42°F | 0.25" | 0" |
| 1973 | 66°F | 44°F | 0" | 0" |
| 1972 | 83°F | 56°F | 0" | 0" |
| 1971 | 49°F | 40°F | 1.04" | 0" |