Weather on September 8 at Isle Royale
Isle Royale National Park
Based on 50 years of data from Houghton, MI
Planning Your Visit
September 8th in Isle Royale National Park (via Houghton, MI) typically brings mild fall weather, with average highs around 69°F and lows near 49°F. Over 50 years of records, the warmest September 8th was in 2002 (80°F average), while the coldest was 1975 (44°F) — a 36°F range across recorded history. Rain or other precipitation has occurred on about 34% of September 8th dates historically, with the wettest September 8th recording 2.39" of rain. The last decade has been 9.2°F cooler on this date compared to 20-30 years ago.
The last decade has been 9.2°F cooler on this date compared to 20-30 years ago.
Planning for September 8th in Isle Royale? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 70°F | 42°F | 1.27" | -- |
| 2024 | 75°F | 47°F | 0" | -- |
| 2023 | 63°F | 44°F | 0" | -- |
| 2022 | 86°F | 49°F | 0" | -- |
| 2021 | 67°F | 46°F | 0.1" | -- |
| 2020 | 53°F | 36°F | 0" | -- |
| 2019 | 61°F | 47°F | 0" | -- |
| 2018 | 61°F | 47°F | 0" | -- |
| 2017 | 61°F | 39°F | 0" | -- |
| 2016 | 69°F | 59°F | 0.08" | -- |
| 2015 | 76°F | 58°F | 0.03" | -- |
| 2014 | 76°F | 52°F | 0" | -- |
| 2013 | 63°F | 52°F | 0" | -- |
| 2012 | 64°F | 44°F | 0.08" | -- |
| 2011 | 80°F | 55°F | 0" | -- |
| 2010 | 57°F | 44°F | 0" | -- |
| 2009 | 77°F | 53°F | 0" | -- |
| 2008 | 57°F | 37°F | 0" | -- |
| 2007 | 65°F | 47°F | 0" | -- |
| 2006 | 61°F | 39°F | 1.73" | -- |
| 2005 | 74°F | 49°F | 0" | -- |
| 2004 | 62°F | 46°F | 0" | -- |
| 2003 | 77°F | 56°F | 0" | -- |
| 2002 | 91°F | 68°F | 0" | 0" |
| 2001 | 70°F | 61°F | 1.04" | 0" |
| 2000 | 75°F | 52°F | 0" | 0" |
| 1999 | 80°F | 61°F | 0.46" | 0" |
| 1998 | 66°F | 52°F | 0.3" | 0" |
| 1997 | 70°F | 56°F | 0" | 0" |
| 1996 | 80°F | 60°F | 0" | 0" |
| 1995 | 62°F | 37°F | 0" | 0" |
| 1994 | 73°F | 47°F | 0" | 0" |
| 1993 | 66°F | 42°F | 0.03" | 0" |
| 1992 | 58°F | 48°F | 0.08" | 0" |
| 1991 | 70°F | 60°F | 1.02" | 0" |
| 1990 | 73°F | 44°F | 0" | 0" |
| 1989 | 70°F | 58°F | 0" | 0" |
| 1988 | 67°F | 52°F | 0" | 0" |
| 1983 | 83°F | 52°F | 0" | 0" |
| 1981 | 58°F | 47°F | 0" | 0" |
| 1980 | 81°F | 54°F | 2.39" | 0" |
| 1979 | 63°F | 39°F | 0" | 0" |
| 1978 | 57°F | 55°F | 0.03" | 0" |
| 1977 | 70°F | 51°F | 0.18" | 0" |
| 1976 | 79°F | 57°F | 0.1" | 0" |
| 1975 | 50°F | 37°F | 0" | 0" |
| 1974 | 63°F | 46°F | 0.1" | 0" |
| 1973 | 64°F | 45°F | 0" | 0" |
| 1972 | 62°F | 45°F | 0" | 0" |
| 1971 | 78°F | 54°F | 0" | 0" |