Weather on January 21 at Isle Royale
Isle Royale National Park
Based on 51 years of data from Houghton, MI
Planning Your Visit
January 21st in Isle Royale National Park (via Houghton, MI) typically brings very cold winter weather, with average highs around 22°F and lows near 8°F. Over 51 years of records, the warmest January 21st was in 2017 (34°F average), while the coldest was 2025 (-7°F) — a 41°F range across recorded history. Precipitation has occurred on 41% of recorded January 21st dates, with snow falling 35% of the time (heaviest snowfall: 6.6"). The last decade has been 3.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.0°F warmer on this date compared to 20-30 years ago.
Planning for January 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 |
|---|---|---|---|---|
| 2026 | 19°F | 3°F | 0.08" | -- |
| 2025 | -2°F | -12°F | 0" | -- |
| 2024 | 25°F | 6°F | 0" | -- |
| 2023 | 25°F | 21°F | 0" | -- |
| 2022 | 20°F | -12°F | 0" | -- |
| 2021 | 37°F | 10°F | 0.38" | -- |
| 2020 | 30°F | 14°F | 0" | -- |
| 2019 | 15°F | 0°F | 0" | -- |
| 2018 | 35°F | 21°F | 0" | -- |
| 2017 | 35°F | 33°F | 0.69" | -- |
| 2016 | 20°F | 18°F | 0" | -- |
| 2015 | 25°F | 9°F | 0" | -- |
| 2014 | 3°F | -4°F | 0" | -- |
| 2013 | 4°F | -9°F | 0" | -- |
| 2012 | 18°F | 5°F | 0" | -- |
| 2011 | 3°F | -3°F | -- | -- |
| 2010 | 31°F | 10°F | 0" | -- |
| 2009 | 25°F | 19°F | 0" | -- |
| 2008 | 8°F | 0°F | 0.08" | -- |
| 2007 | 24°F | 15°F | 0.03" | -- |
| 2006 | 26°F | 14°F | 0" | -- |
| 2005 | 17°F | 1°F | 0" | -- |
| 2004 | 22°F | 3°F | 0" | -- |
| 2003 | 4°F | 0°F | 0.46" | 2.1" |
| 2002 | 25°F | 20°F | 0.13" | 1" |
| 2001 | 22°F | 18°F | 0.74" | 2" |
| 2000 | 8°F | -1°F | 0.41" | 2.1" |
| 1999 | 24°F | 12°F | 0" | 0" |
| 1998 | 25°F | 19°F | 0" | 0" |
| 1997 | 33°F | 3°F | 0" | 0" |
| 1996 | 20°F | -4°F | 0.03" | 0.1" |
| 1995 | 25°F | 20°F | 0.53" | 2.9" |
| 1994 | 20°F | -5°F | 0.28" | 1.5" |
| 1993 | 35°F | 29°F | 0.97" | 1.1" |
| 1992 | 25°F | 11°F | 0" | 0" |
| 1991 | 9°F | 0°F | 0.13" | 1" |
| 1990 | 28°F | 10°F | 0.38" | 1.9" |
| 1989 | 36°F | 3°F | 0" | 0" |
| 1988 | 23°F | 10°F | 0.1" | 0.4" |
| 1982 | 12°F | 5°F | 0.15" | 1" |
| 1981 | 37°F | 22°F | 0" | 0" |
| 1980 | 26°F | 7°F | 0" | 0" |
| 1979 | 25°F | 22°F | 0.53" | 4.4" |
| 1978 | 24°F | 8°F | 0" | 0" |
| 1977 | 15°F | 2°F | 0" | 0" |
| 1976 | 18°F | 7°F | 0.18" | 1.7" |
| 1975 | 19°F | -1°F | 1.68" | 6.6" |
| 1974 | 31°F | 25°F | 1.09" | 5.1" |
| 1973 | 27°F | 10°F | 0" | 0" |
| 1972 | 22°F | -5°F | 0" | 0.3" |
| 1971 | 26°F | 17°F | 0" | 0.4" |