Weather on September 5 at Isle Royale
Isle Royale National Park
Based on 50 years of data from Houghton, MI
Planning Your Visit
September 5th in Isle Royale National Park (via Houghton, MI) typically brings pleasant fall weather, with average highs around 71°F and lows near 52°F. Over 50 years of records, the warmest September 5th was in 2023 (78°F average), while the coldest was 2011 (47°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 44% of September 5th dates historically, with the wettest September 5th recording 4.17" of rain. The last decade has been 6.4°F cooler on this date compared to 20-30 years ago.
The last decade has been 6.4°F cooler on this date compared to 20-30 years ago.
Planning for September 5th 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 | 51°F | 45°F | 0.89" | -- |
| 2024 | 67°F | 52°F | 2.11" | -- |
| 2023 | 90°F | 66°F | 4.17" | -- |
| 2022 | 71°F | 40°F | 0" | -- |
| 2021 | 66°F | 51°F | 0.03" | -- |
| 2020 | 66°F | 43°F | 0" | -- |
| 2019 | 69°F | 45°F | 0.08" | -- |
| 2018 | 69°F | 53°F | 0.94" | -- |
| 2017 | 56°F | 50°F | 0.53" | -- |
| 2016 | 81°F | 61°F | 2.18" | -- |
| 2015 | 82°F | 59°F | 0" | -- |
| 2014 | 70°F | 51°F | 0.05" | -- |
| 2013 | 69°F | 41°F | 0" | -- |
| 2012 | 70°F | 53°F | 0.43" | -- |
| 2011 | 59°F | 36°F | 0" | -- |
| 2010 | 60°F | 39°F | 0" | -- |
| 2009 | 78°F | 50°F | 0" | -- |
| 2008 | 62°F | 47°F | 0" | -- |
| 2007 | 88°F | 61°F | 0" | -- |
| 2006 | 79°F | 48°F | 0" | -- |
| 2005 | 86°F | 60°F | 0" | -- |
| 2004 | 79°F | 63°F | 0" | -- |
| 2003 | 75°F | 36°F | 0" | -- |
| 2002 | 67°F | 54°F | 0" | 0" |
| 2001 | 85°F | 50°F | 0" | 0" |
| 2000 | 66°F | 40°F | 0" | 0" |
| 1999 | 90°F | 61°F | 0.25" | 0" |
| 1998 | 95°F | 56°F | 0" | 0" |
| 1997 | 72°F | 51°F | 0.25" | 0" |
| 1996 | 79°F | 60°F | 0" | 0" |
| 1995 | 80°F | 61°F | 0.48" | 0" |
| 1994 | 66°F | 55°F | 0.2" | 0" |
| 1993 | 58°F | 47°F | 0" | 0" |
| 1992 | 83°F | 60°F | 1.12" | 0" |
| 1991 | 62°F | 49°F | 0.03" | 0" |
| 1990 | 71°F | 53°F | 0" | 0" |
| 1989 | 74°F | 59°F | 0" | 0" |
| 1988 | 54°F | 42°F | 0.25" | 0" |
| 1983 | 65°F | 60°F | 3.68" | 0" |
| 1981 | 58°F | 44°F | 0" | 0" |
| 1980 | 68°F | 55°F | 0" | 0" |
| 1979 | 81°F | 60°F | 0.2" | 0" |
| 1978 | 79°F | 60°F | 0.03" | 0" |
| 1977 | 57°F | 52°F | 0" | 0" |
| 1976 | 64°F | 41°F | 0" | 0" |
| 1975 | 59°F | 50°F | 1.45" | 0" |
| 1974 | 72°F | 45°F | 0" | 0" |
| 1973 | 68°F | 56°F | 0" | 0" |
| 1972 | 65°F | 41°F | 0" | 0" |
| 1971 | 81°F | 65°F | 0.03" | 0" |