Weather on March 20 at Isle Royale
Isle Royale National Park
Based on 51 years of data from Houghton, MI
Planning Your Visit
March 20th in Isle Royale National Park (via Houghton, MI) typically brings cold spring weather, with average highs around 36°F and lows near 21°F. Over 51 years of records, the warmest March 20th was in 2012 (63°F average), while the coldest was 1988 (9°F) — a 54°F range across recorded history. Precipitation has occurred on 25% of recorded March 20th dates, with snow falling 14% of the time (heaviest snowfall: 3.1"). The last decade has been 2.1°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.1°F cooler on this date compared to 20-30 years ago.
Planning for March 20th in Isle Royale? Bundle up with warm layers and protect extremities from the cold.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2026 | 40°F | 29°F | 0" | -- |
| 2025 | 39°F | 25°F | 0" | -- |
| 2024 | 21°F | 14°F | 0" | -- |
| 2023 | 30°F | 2°F | 0" | -- |
| 2022 | 49°F | 27°F | 0" | -- |
| 2021 | 61°F | 31°F | 0" | -- |
| 2020 | 32°F | 3°F | 0" | -- |
| 2019 | 41°F | 33°F | 0" | -- |
| 2018 | 24°F | 14°F | 0" | -- |
| 2017 | 45°F | 33°F | 0" | -- |
| 2016 | 32°F | 13°F | 0" | -- |
| 2015 | 42°F | 32°F | 0.13" | -- |
| 2014 | 32°F | 13°F | 0" | -- |
| 2013 | 21°F | 14°F | 0.03" | -- |
| 2012 | 74°F | 53°F | 0" | -- |
| 2011 | 36°F | 30°F | 0.13" | -- |
| 2010 | 30°F | 20°F | 0" | -- |
| 2009 | 34°F | 6°F | 0.2" | -- |
| 2008 | 24°F | 4°F | 0" | -- |
| 2007 | 33°F | 4°F | 0" | -- |
| 2006 | 27°F | 10°F | 0" | -- |
| 2005 | 30°F | 24°F | 0.03" | -- |
| 2004 | 44°F | 18°F | 0" | -- |
| 2003 | 35°F | 30°F | 0.33" | -- |
| 2002 | 34°F | 16°F | 0" | 0" |
| 2001 | 54°F | 30°F | 0" | 0" |
| 2000 | 39°F | 30°F | 0" | 0" |
| 1999 | 47°F | 25°F | 0" | 0" |
| 1998 | 40°F | 19°F | 0" | 0" |
| 1997 | 42°F | 23°F | 0" | 0" |
| 1996 | 29°F | 14°F | 0" | 0" |
| 1995 | 43°F | 32°F | 0.61" | 0.5" |
| 1994 | 39°F | 22°F | 0" | 0" |
| 1993 | 33°F | 20°F | 0.03" | 0.2" |
| 1992 | 27°F | 8°F | 0" | 0" |
| 1991 | 41°F | 27°F | 0" | 0" |
| 1990 | 43°F | 23°F | 0" | 0" |
| 1989 | 23°F | 13°F | 0.15" | 0.7" |
| 1988 | 17°F | 2°F | 0" | 0" |
| 1982 | 28°F | 25°F | 0.05" | 0.4" |
| 1981 | 29°F | 25°F | 0" | 0" |
| 1980 | 37°F | 27°F | 0" | 0" |
| 1979 | 41°F | 34°F | 0" | 0" |
| 1978 | 36°F | 19°F | 0.79" | 3.1" |
| 1977 | 34°F | 25°F | 0" | 0" |
| 1976 | 48°F | 17°F | 0.66" | 2" |
| 1975 | 35°F | 28°F | 0.08" | 0.5" |
| 1974 | 24°F | 9°F | 0" | 0" |
| 1973 | 33°F | 21°F | 0" | 0" |
| 1972 | 31°F | 21°F | 0" | 0" |
| 1971 | 28°F | 12°F | 0" | 0" |