Weather on September 11 at Isle Royale
Isle Royale National Park
Based on 50 years of data from Houghton, MI
Planning Your Visit
September 11th in Isle Royale National Park (via Houghton, MI) typically brings mild fall weather, with average highs around 69°F and lows near 51°F. Over 50 years of records, the warmest September 11th was in 2005 (79°F average), while the coldest was 2014 (43°F) — a 36°F range across recorded history. Rain or other precipitation has occurred on about 24% of September 11th dates historically, with the wettest September 11th recording 4.22" of rain. The last decade has been 4.5°F cooler on this date compared to 20-30 years ago.
The last decade has been 4.5°F cooler on this date compared to 20-30 years ago.
Planning for September 11th in Isle Royale? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 65°F | 54°F | 0" | -- |
| 2024 | 78°F | 57°F | 0" | -- |
| 2023 | 64°F | 49°F | 0" | -- |
| 2022 | 70°F | 47°F | 0" | -- |
| 2021 | 71°F | 58°F | 0" | -- |
| 2020 | 69°F | 42°F | 0" | -- |
| 2019 | 55°F | 52°F | 0" | -- |
| 2018 | 82°F | 57°F | 0" | -- |
| 2017 | 76°F | 55°F | 0" | -- |
| 2016 | 74°F | 47°F | 0" | -- |
| 2015 | 56°F | 42°F | 0.08" | -- |
| 2014 | 51°F | 36°F | 0" | -- |
| 2013 | 77°F | 53°F | 0" | -- |
| 2012 | 78°F | 59°F | 0" | -- |
| 2011 | 84°F | 56°F | 0" | -- |
| 2010 | 60°F | 53°F | 2.06" | -- |
| 2009 | 79°F | 59°F | 0" | -- |
| 2008 | 63°F | 56°F | 1.19" | -- |
| 2007 | 53°F | 44°F | 3.2" | -- |
| 2006 | 61°F | 44°F | 0" | -- |
| 2005 | 90°F | 69°F | 0" | -- |
| 2004 | 68°F | 52°F | 0.03" | -- |
| 2003 | 83°F | 61°F | 0" | -- |
| 2002 | 74°F | 53°F | 0" | 0" |
| 2001 | 71°F | 50°F | 0.05" | 0" |
| 2000 | 80°F | 56°F | 0" | 0" |
| 1999 | 65°F | 48°F | 0.15" | 0" |
| 1998 | 88°F | 68°F | 0" | 0" |
| 1997 | 68°F | 47°F | 0" | 0" |
| 1996 | 67°F | 54°F | 0" | 0" |
| 1995 | 75°F | 48°F | 0" | 0" |
| 1994 | 81°F | 53°F | 0" | 0" |
| 1993 | 64°F | 44°F | 0" | 0" |
| 1992 | 66°F | 37°F | 0" | 0" |
| 1991 | 63°F | 44°F | 0" | 0" |
| 1990 | 78°F | 43°F | 0" | 0" |
| 1989 | 57°F | 49°F | 0.2" | 0" |
| 1988 | 65°F | 48°F | 0" | 0" |
| 1983 | 60°F | 54°F | 0" | 0" |
| 1981 | 70°F | 53°F | 0" | 0" |
| 1980 | 68°F | 47°F | 0" | 0" |
| 1979 | 56°F | 45°F | 2.24" | 0" |
| 1978 | 63°F | 49°F | 4.22" | 0" |
| 1977 | 68°F | 45°F | 0" | 0" |
| 1976 | 81°F | 56°F | 0" | 0" |
| 1975 | 59°F | 44°F | 0.15" | 0" |
| 1974 | 70°F | 52°F | 0.05" | 0" |
| 1973 | 62°F | 52°F | 0" | 0" |
| 1972 | 65°F | 48°F | 0" | 0" |
| 1971 | 60°F | 43°F | 0" | 0" |