Weather on May 4 at Isle Royale
Isle Royale National Park
MIMidwest800 ft elevation
Avg High58°F
Avg Low37°F
Warmest200072°F
Coldest197935°F
Based on 50 years of data from Houghton, MI
Planning Your Visit
May 4th in Isle Royale National Park (via Houghton, MI) typically brings cool spring weather, with average highs around 58°F and lows near 37°F. Over 50 years of records, the warmest May 4th was in 2000 (72°F average), while the coldest was 1979 (35°F) — a 37°F range across recorded history. Rain or other precipitation has occurred on about 28% of May 4th dates historically, with the wettest May 4th recording 1.3" of rain. The last decade has been 5.0°F cooler on this date compared to 20-30 years ago.
The last decade has been 5.0°F cooler on this date compared to 20-30 years ago.
Planning for May 4th in Isle Royale? Bring layers as temperatures can vary throughout the day.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 57°F | 34°F | 0" | -- |
| 2024 | 60°F | 42°F | 0.28" | -- |
| 2023 | 52°F | 39°F | 0" | -- |
| 2022 | 54°F | 31°F | 0" | -- |
| 2021 | 45°F | 35°F | 0.03" | -- |
| 2020 | 42°F | 29°F | 0" | -- |
| 2019 | 69°F | 37°F | 0.03" | -- |
| 2018 | 67°F | 41°F | 0" | -- |
| 2017 | 58°F | 40°F | 0" | -- |
| 2016 | 47°F | 32°F | 0" | -- |
| 2015 | 61°F | 40°F | 0" | -- |
| 2014 | 46°F | 32°F | 0" | -- |
| 2013 | 47°F | 32°F | 0.1" | -- |
| 2012 | 50°F | 39°F | 0" | -- |
| 2011 | 61°F | 33°F | 0" | -- |
| 2010 | 59°F | 36°F | 0.33" | -- |
| 2009 | 61°F | 31°F | 0" | -- |
| 2008 | 52°F | 26°F | 0.33" | -- |
| 2007 | 59°F | 39°F | 0" | -- |
| 2006 | 49°F | 39°F | 0.05" | -- |
| 2005 | 59°F | 33°F | 0" | -- |
| 2004 | 54°F | 34°F | 0" | -- |
| 2003 | 60°F | 29°F | 0" | 0" |
| 2002 | 70°F | 30°F | 0" | 0" |
| 2001 | 60°F | 43°F | 0" | 0" |
| 2000 | 84°F | 59°F | 0" | 0" |
| 1999 | 75°F | 51°F | 0" | 0" |
| 1998 | 72°F | 35°F | 0" | 0" |
| 1997 | 62°F | 27°F | 0" | 0" |
| 1996 | 50°F | 27°F | 0" | 0" |
| 1995 | 64°F | 38°F | 0" | 0" |
| 1994 | 66°F | 50°F | 0.51" | 0" |
| 1993 | 52°F | 40°F | 0.86" | 0" |
| 1992 | 45°F | 33°F | 0" | 0" |
| 1991 | 39°F | 32°F | 0.15" | 0" |
| 1990 | 62°F | 38°F | 0" | 0" |
| 1989 | 66°F | 46°F | 0.18" | 0" |
| 1988 | 71°F | 43°F | 0" | 0" |
| 1982 | 74°F | 46°F | 0.03" | 0" |
| 1981 | 60°F | 42°F | 1.3" | 0" |
| 1980 | 84°F | 52°F | 0" | 0" |
| 1979 | 40°F | 30°F | 0" | 0" |
| 1978 | 52°F | 34°F | 0" | 0" |
| 1977 | 63°F | 38°F | 0" | 0" |
| 1976 | 70°F | 28°F | 0" | 0" |
| 1975 | 51°F | 36°F | 0" | 0" |
| 1974 | 47°F | 30°F | 0" | 0" |
| 1973 | 47°F | 31°F | 0" | 0" |
| 1972 | 47°F | 32°F | 0.08" | 0" |
| 1971 | 60°F | 34°F | 0" | 0" |
May 4 at Nearby Parks
Holiday Weather at Isle Royale
Official NPS WebsiteVisit nps.gov/isro for park information, alerts, and reservations
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