Weather on October 23 at Isle Royale
Isle Royale National Park
Based on 50 years of data from Houghton, MI
Planning Your Visit
October 23rd in Isle Royale National Park (via Houghton, MI) typically brings chilly fall weather, with average highs around 49°F and lows near 36°F. Over 50 years of records, the warmest October 23rd was in 2022 (61°F average), while the coldest was 1981 (26°F) — a 35°F range across recorded history. Precipitation has occurred on 64% of recorded October 23rd dates, with snow falling 10% of the time (heaviest snowfall: 11.1"). Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for October 23rd 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 | 46°F | 38°F | 0.46" | -- |
| 2024 | 53°F | 36°F | 0.43" | -- |
| 2023 | 53°F | 34°F | 0" | -- |
| 2022 | 71°F | 50°F | 0" | -- |
| 2021 | 47°F | 34°F | 0.18" | -- |
| 2020 | 38°F | 33°F | 0.13" | -- |
| 2019 | 42°F | 38°F | 0.13" | -- |
| 2018 | 42°F | 34°F | 0" | -- |
| 2017 | 61°F | 41°F | 0" | -- |
| 2016 | 50°F | 30°F | 0.15" | -- |
| 2015 | 46°F | 34°F | 0.81" | -- |
| 2014 | 48°F | 41°F | 0.25" | -- |
| 2013 | 39°F | 32°F | 0.18" | -- |
| 2012 | 51°F | 46°F | 2.95" | -- |
| 2011 | 53°F | 31°F | 0.38" | -- |
| 2010 | 52°F | 41°F | 0" | -- |
| 2009 | 38°F | 33°F | 1.45" | -- |
| 2008 | 51°F | 32°F | 0" | -- |
| 2007 | 51°F | 34°F | 0.89" | -- |
| 2006 | 39°F | 31°F | 0.25" | -- |
| 2005 | 46°F | 36°F | 0.05" | -- |
| 2004 | 57°F | 50°F | 2.13" | -- |
| 2003 | 43°F | 26°F | 0.03" | -- |
| 2002 | 34°F | 29°F | 0.05" | 0.2" |
| 2001 | 55°F | 38°F | 0.28" | 0" |
| 2000 | 63°F | 50°F | 0.33" | 0" |
| 1999 | 39°F | 34°F | 0.53" | 0" |
| 1998 | 69°F | 52°F | 0" | 0" |
| 1997 | 38°F | 29°F | 0" | 0" |
| 1996 | 48°F | 45°F | 1.14" | 0" |
| 1995 | 43°F | 35°F | 0.41" | 0" |
| 1994 | 55°F | 37°F | 0.53" | 0" |
| 1993 | 69°F | 34°F | 0" | 0" |
| 1992 | 67°F | 46°F | 0" | 0" |
| 1991 | 50°F | 41°F | 0.25" | 0" |
| 1990 | 53°F | 36°F | 0" | 0" |
| 1989 | 69°F | 43°F | 0" | 0" |
| 1988 | 40°F | 33°F | 2.95" | 4.8" |
| 1983 | 51°F | 32°F | 0" | 0" |
| 1981 | 29°F | 24°F | 0.84" | 3.7" |
| 1980 | 46°F | 34°F | 1.37" | 0" |
| 1979 | 33°F | 31°F | 2.84" | 11.1" |
| 1978 | 42°F | 32°F | 0.18" | 0.7" |
| 1977 | 48°F | 29°F | 0" | 0" |
| 1976 | 38°F | 29°F | 0" | 0" |
| 1975 | 56°F | 44°F | 1.35" | 0" |
| 1974 | 52°F | 32°F | 0" | 0" |
| 1973 | 64°F | 46°F | 0.03" | 0" |
| 1972 | 37°F | 28°F | 0" | 0" |
| 1971 | 51°F | 44°F | 0" | 0" |