Weather on September 29 at Isle Royale
Isle Royale National Park
Based on 51 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 51 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 43% of recorded September 29th dates, with snow falling 2% of the time. The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
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 |
|---|---|---|---|---|
| 2026 | 72°F | 47°F | 0" | -- |
| 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 | 0.02" | -- |
| 2019 | 55°F | 42°F | 0.02" | -- |
| 2018 | 45°F | 30°F | 0.01" | -- |
| 2017 | 57°F | 35°F | 0" | -- |
| 2016 | 65°F | 41°F | 0" | -- |
| 2015 | 55°F | 34°F | 0" | -- |
| 2014 | 47°F | 40°F | 0.24" | -- |
| 2013 | 69°F | 47°F | 0" | -- |
| 2012 | 62°F | 37°F | 0" | -- |
| 2011 | 57°F | 46°F | 0.16" | -- |
| 2010 | 69°F | 43°F | 0.19" | -- |
| 2009 | 47°F | 40°F | 0.01" | -- |
| 2008 | 56°F | 45°F | 0.2" | -- |
| 2007 | 67°F | 46°F | 0.32" | -- |
| 2006 | 52°F | 34°F | 0" | -- |
| 2005 | 54°F | 40°F | 0" | -- |
| 2004 | 61°F | 37°F | 0" | -- |
| 2003 | 47°F | 33°F | 0.09" | -- |
| 2002 | 55°F | 46°F | 0.1" | 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 | 0.05" | 0" |
| 1997 | 63°F | 52°F | 0.42" | 0" |
| 1996 | 57°F | 42°F | 0" | 0" |
| 1995 | 80°F | 55°F | 0" | 0" |
| 1994 | 58°F | 41°F | 0.02" | 0" |
| 1993 | 43°F | 30°F | 0.03" | 0.2" |
| 1992 | 50°F | 36°F | 0" | 0" |
| 1991 | 47°F | 33°F | 0" | 0" |
| 1990 | 48°F | 43°F | 0.01" | 0" |
| 1989 | 56°F | 42°F | 0" | 0" |
| 1988 | 60°F | 46°F | 0.06" | 0" |
| 1983 | 71°F | 53°F | 0.18" | 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 | 0.13" | 0" |
| 1977 | 54°F | 45°F | 0.65" | 0" |
| 1976 | 59°F | 41°F | 0" | 0" |
| 1975 | 64°F | 43°F | 0" | 0" |
| 1974 | 46°F | 39°F | 0.09" | 0" |
| 1973 | 61°F | 44°F | 0" | 0" |
| 1972 | 46°F | 40°F | 0.15" | 0" |
| 1971 | 65°F | 47°F | 0" | 0" |