Weather on September 29 at Isle Royale
Isle Royale National Park
Based on 50 years of data from Houghton, MI
Planning Your Visit
September 29th in Isle Royale National Park (via Houghton, MI) typically brings cool fall weather, with average highs around 59°F and lows near 43°F. Over 50 years of records, the warmest September 29th was in 1995 (68°F average), while the coldest was 1993 (36°F) — a 32°F range across recorded history. Precipitation has occurred on 44% of recorded September 29th dates, with snow falling 2% of the time. 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 September 29th 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 | 80°F | 51°F | 0" | -- |
| 2024 | 70°F | 51°F | 0" | -- |
| 2023 | 68°F | 50°F | 0" | -- |
| 2022 | 64°F | 35°F | 0" | -- |
| 2021 | 71°F | 47°F | 0" | -- |
| 2020 | 56°F | 45°F | 0.05" | -- |
| 2019 | 55°F | 42°F | 0.05" | -- |
| 2018 | 45°F | 30°F | 0.03" | -- |
| 2017 | 57°F | 35°F | 0" | -- |
| 2016 | 65°F | 41°F | 0" | -- |
| 2015 | 55°F | 34°F | 0" | -- |
| 2014 | 47°F | 40°F | 0.61" | -- |
| 2013 | 69°F | 47°F | 0" | -- |
| 2012 | 62°F | 37°F | 0" | -- |
| 2011 | 57°F | 46°F | 0.41" | -- |
| 2010 | 69°F | 43°F | 0.48" | -- |
| 2009 | 47°F | 40°F | 0.03" | -- |
| 2008 | 56°F | 45°F | 0.51" | -- |
| 2007 | 67°F | 46°F | 0.81" | -- |
| 2006 | 52°F | 34°F | 0" | -- |
| 2005 | 54°F | 40°F | 0" | -- |
| 2004 | 61°F | 37°F | 0" | -- |
| 2003 | 47°F | 33°F | 0.23" | -- |
| 2002 | 55°F | 46°F | 0.25" | 0" |
| 2001 | 66°F | 42°F | 0" | 0" |
| 2000 | 82°F | 44°F | 0" | 0" |
| 1999 | 58°F | 43°F | 0" | 0" |
| 1998 | 72°F | 50°F | 0.13" | 0" |
| 1997 | 63°F | 52°F | 1.07" | 0" |
| 1996 | 57°F | 42°F | 0" | 0" |
| 1995 | 80°F | 55°F | 0" | 0" |
| 1994 | 58°F | 41°F | 0.05" | 0" |
| 1993 | 43°F | 30°F | 0.08" | 0.2" |
| 1992 | 50°F | 36°F | 0" | 0" |
| 1991 | 47°F | 33°F | 0" | 0" |
| 1990 | 48°F | 43°F | 0.03" | 0" |
| 1989 | 56°F | 42°F | 0" | 0" |
| 1988 | 60°F | 46°F | 0.15" | 0" |
| 1983 | 71°F | 53°F | 0.46" | 0" |
| 1981 | 43°F | 37°F | 0" | 0" |
| 1980 | 72°F | 50°F | 0" | 0" |
| 1979 | 54°F | 44°F | 0" | 0" |
| 1978 | 52°F | 49°F | 0.33" | 0" |
| 1977 | 54°F | 45°F | 1.65" | 0" |
| 1976 | 59°F | 41°F | 0" | 0" |
| 1975 | 64°F | 43°F | 0" | 0" |
| 1974 | 46°F | 39°F | 0.23" | 0" |
| 1973 | 61°F | 44°F | 0" | 0" |
| 1972 | 46°F | 40°F | 0.38" | 0" |
| 1971 | 65°F | 47°F | 0" | 0" |