Weather on April 20 at Isle Royale
Isle Royale National Park
Based on 51 years of data from Houghton, MI
Planning Your Visit
April 20th 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 51 years of records, the warmest April 20th was in 1980 (54°F average), while the coldest was 2013 (18°F) — a 36°F range across recorded history. Precipitation has occurred on 33% of recorded April 20th dates, with snow falling 2% of the time. The last decade has been 2.6°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.6°F cooler on this date compared to 20-30 years ago.
Planning for April 20th 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 |
|---|---|---|---|---|
| 2026 | 50°F | 16°F | 0" | -- |
| 2025 | 46°F | 28°F | 0" | -- |
| 2024 | 51°F | 33°F | 0.08" | 0" |
| 2023 | 36°F | 32°F | 0.79" | -- |
| 2022 | 40°F | 20°F | 1.27" | -- |
| 2021 | 29°F | 21°F | 0.03" | -- |
| 2020 | 47°F | 29°F | 0" | -- |
| 2019 | 64°F | 35°F | 0" | -- |
| 2018 | 54°F | 29°F | 0" | -- |
| 2017 | 38°F | 34°F | 1.04" | -- |
| 2016 | 61°F | 31°F | 0" | -- |
| 2015 | 41°F | 33°F | 0.79" | -- |
| 2014 | 53°F | 32°F | 0" | -- |
| 2013 | 25°F | 10°F | 0" | -- |
| 2012 | 47°F | 29°F | 0" | -- |
| 2011 | 38°F | 28°F | 0" | -- |
| 2010 | 61°F | 33°F | 0" | -- |
| 2009 | 33°F | 32°F | 1.4" | -- |
| 2008 | 53°F | 36°F | 0" | -- |
| 2007 | 65°F | 32°F | 0" | -- |
| 2006 | 60°F | 45°F | 0.38" | -- |
| 2005 | 47°F | 28°F | 0" | -- |
| 2004 | 45°F | 30°F | 0" | -- |
| 2003 | 49°F | 34°F | 0.74" | -- |
| 2002 | 36°F | 25°F | 0" | -- |
| 2001 | 58°F | 38°F | 0.48" | 0" |
| 2000 | 42°F | 37°F | 0" | 0" |
| 1999 | 54°F | 27°F | 0" | 0" |
| 1998 | 62°F | 29°F | 0" | 0" |
| 1997 | 48°F | 32°F | 0" | 0" |
| 1996 | 54°F | 32°F | 0.41" | 0" |
| 1995 | 50°F | 24°F | 0" | 0" |
| 1994 | 47°F | 29°F | 0" | 0" |
| 1993 | 42°F | 30°F | 0" | 0" |
| 1992 | 63°F | 36°F | 0.69" | 0" |
| 1991 | 41°F | 29°F | 0" | 0" |
| 1990 | 65°F | 39°F | 0" | 0" |
| 1989 | 49°F | 30°F | 0" | 0" |
| 1988 | 39°F | 29°F | 0.1" | 0.3" |
| 1982 | 30°F | 20°F | 0" | 0" |
| 1981 | 36°F | 19°F | 0" | 0" |
| 1980 | 65°F | 43°F | 0" | 0" |
| 1979 | 50°F | 39°F | 0.58" | 0" |
| 1978 | 35°F | 25°F | 0" | 0" |
| 1977 | 57°F | 41°F | 0.03" | 0" |
| 1976 | 46°F | 29°F | 0" | 0" |
| 1975 | 37°F | 29°F | 0" | 0" |
| 1974 | 66°F | 35°F | 0.25" | 0" |
| 1973 | 59°F | 45°F | 0.03" | 0" |
| 1972 | 49°F | 26°F | 0" | 0" |
| 1971 | 52°F | 37°F | 0" | 0" |