Weather on November 21 at Isle Royale
Isle Royale National Park
Based on 49 years of data from Houghton, MI
Planning Your Visit
November 21st in Isle Royale National Park (via Houghton, MI) typically brings cold fall weather, with average highs around 35°F and lows near 24°F. Over 49 years of records, the warmest November 21st was in 1990 (51°F average), while the coldest was 2018 (11°F) — a 40°F range across recorded history. Precipitation has occurred on 55% of recorded November 21st dates, with snow falling 29% of the time (heaviest snowfall: 6.7"). The last decade has been 1.1°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.1°F cooler on this date compared to 20-30 years ago.
Planning for November 21st in Isle Royale? Bundle up with warm layers and protect extremities from the cold. Consider bringing rain gear or an umbrella. Check road conditions if traveling, as snow is possible.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 38°F | 29°F | 0" | -- |
| 2024 | 43°F | 37°F | 1.07" | -- |
| 2023 | 46°F | 32°F | 0" | -- |
| 2022 | 31°F | 22°F | 0" | -- |
| 2021 | 34°F | 19°F | 0.3" | -- |
| 2020 | 34°F | 25°F | 0" | -- |
| 2019 | 37°F | 25°F | 1.24" | -- |
| 2018 | 16°F | 6°F | 0.03" | -- |
| 2017 | 41°F | 20°F | 0.03" | -- |
| 2016 | 31°F | 13°F | 0" | -- |
| 2015 | 27°F | 21°F | 0" | -- |
| 2014 | 31°F | 10°F | 0.05" | -- |
| 2013 | 38°F | 24°F | 0.13" | -- |
| 2012 | 52°F | 30°F | 0" | -- |
| 2011 | 31°F | 20°F | 0" | -- |
| 2010 | 36°F | 25°F | 0.41" | -- |
| 2009 | 50°F | 27°F | 0" | -- |
| 2008 | 17°F | 12°F | 0.1" | -- |
| 2007 | 34°F | 22°F | 0" | -- |
| 2006 | 49°F | 30°F | 0" | -- |
| 2005 | 39°F | 21°F | 0.08" | -- |
| 2004 | 37°F | 32°F | 0" | -- |
| 2003 | 35°F | 29°F | 0" | -- |
| 2002 | 36°F | 29°F | 0.13" | 0" |
| 2001 | 48°F | 25°F | 0" | 0" |
| 2000 | 23°F | 16°F | 0.13" | 1.5" |
| 1999 | 51°F | 33°F | 0" | 0" |
| 1998 | 37°F | 14°F | 0" | 0" |
| 1997 | 27°F | 20°F | 0" | 0.1" |
| 1996 | 31°F | 23°F | 0.03" | 0.1" |
| 1995 | 27°F | 19°F | 0.05" | 0.7" |
| 1994 | 43°F | 37°F | 2.69" | 0" |
| 1993 | 50°F | 25°F | 0" | 0" |
| 1992 | 37°F | 29°F | 1.12" | 0.4" |
| 1991 | 47°F | 37°F | 0" | 0" |
| 1990 | 60°F | 43°F | 0.36" | 0" |
| 1989 | 20°F | 13°F | 0.43" | 6.7" |
| 1988 | 33°F | 23°F | 0" | 0" |
| 1981 | 26°F | 23°F | 0" | 0" |
| 1980 | 36°F | 28°F | 0.03" | 0.1" |
| 1979 | 36°F | 32°F | 0" | 0" |
| 1978 | 19°F | 13°F | 0.25" | 2.7" |
| 1977 | 31°F | 20°F | 0.33" | 1.5" |
| 1976 | 23°F | 17°F | 0.18" | 1.5" |
| 1975 | 27°F | 22°F | 0.08" | 0.5" |
| 1974 | 29°F | 25°F | 0.23" | 0.9" |
| 1973 | 48°F | 37°F | 1.6" | 0" |
| 1972 | 28°F | 21°F | 0.15" | 1.4" |
| 1971 | 26°F | 16°F | 0.23" | 1.4" |