Weather on April 17 at Isle Royale
Isle Royale National Park
Based on 50 years of data from Houghton, MI
Planning Your Visit
April 17th in Isle Royale National Park (via Houghton, MI) typically brings chilly spring weather, with average highs around 48°F and lows near 31°F. Over 50 years of records, the warmest April 17th was in 1976 (62°F average), while the coldest was 2011 (24°F) — a 38°F range across recorded history. Precipitation has occurred on 34% of recorded April 17th dates, with snow falling 10% of the time (heaviest snowfall: 1.5"). The last decade has been 1.3°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.3°F cooler on this date compared to 20-30 years ago.
Planning for April 17th in Isle Royale? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 57°F | 30°F | 1.75" | -- |
| 2024 | 53°F | 39°F | 2.77" | 0" |
| 2023 | 30°F | 27°F | 0.03" | -- |
| 2022 | 35°F | 26°F | 0" | -- |
| 2021 | 49°F | 29°F | 0" | -- |
| 2020 | 40°F | 21°F | 0" | -- |
| 2019 | 53°F | 33°F | 0.79" | -- |
| 2018 | 33°F | 24°F | 0.08" | -- |
| 2017 | 33°F | 28°F | 0.05" | -- |
| 2016 | 76°F | 48°F | 0" | -- |
| 2015 | 64°F | 35°F | 0" | -- |
| 2014 | 33°F | 27°F | 0" | -- |
| 2013 | 33°F | 29°F | 0.05" | -- |
| 2012 | 39°F | 24°F | 0" | -- |
| 2011 | 27°F | 22°F | 0" | -- |
| 2010 | 49°F | 34°F | 0" | -- |
| 2009 | 70°F | 39°F | 0" | -- |
| 2008 | 50°F | 34°F | 0" | -- |
| 2007 | 43°F | 38°F | 0" | -- |
| 2006 | 53°F | 33°F | 0" | -- |
| 2005 | 66°F | 40°F | 0" | -- |
| 2004 | 54°F | 30°F | 0" | -- |
| 2003 | 31°F | 26°F | 0.89" | -- |
| 2002 | 69°F | 42°F | 0.03" | -- |
| 2001 | 42°F | 26°F | 0.03" | 0.1" |
| 2000 | 43°F | 30°F | 0" | 0" |
| 1999 | 48°F | 32°F | 0" | 0" |
| 1998 | 49°F | 33°F | 0" | 0" |
| 1997 | 38°F | 22°F | 0" | 0" |
| 1996 | 54°F | 23°F | 0" | 0" |
| 1995 | 46°F | 31°F | 0.05" | 0.5" |
| 1994 | 50°F | 33°F | 0" | 0" |
| 1993 | 40°F | 19°F | 0" | 0" |
| 1992 | 53°F | 30°F | 0" | 0" |
| 1991 | 51°F | 34°F | 0.03" | 0" |
| 1990 | 36°F | 24°F | 0" | 0" |
| 1989 | 40°F | 25°F | 0.3" | 0.3" |
| 1988 | 57°F | 28°F | 0.25" | 0" |
| 1982 | 37°F | 28°F | 1.14" | 1.5" |
| 1981 | 64°F | 27°F | 0" | 0" |
| 1980 | 57°F | 30°F | 0" | 0" |
| 1979 | 46°F | 32°F | 0" | 0" |
| 1978 | 45°F | 24°F | 0" | 0" |
| 1977 | 58°F | 43°F | 0" | 0" |
| 1976 | 74°F | 51°F | 0" | 0" |
| 1975 | 48°F | 34°F | 0.76" | 0" |
| 1974 | 55°F | 33°F | 0" | 0" |
| 1973 | 52°F | 28°F | 0" | 0" |
| 1972 | 39°F | 27°F | 0.03" | 0.1" |
| 1971 | 50°F | 37°F | 0" | 0" |