Weather on September 1 at Isle Royale
Isle Royale National Park
Based on 50 years of data from Houghton, MI
Planning Your Visit
September 1st in Isle Royale National Park (via Houghton, MI) typically brings pleasant fall weather, with average highs around 73°F and lows near 53°F. Over 50 years of records, the warmest September 1st was in 1973 (78°F average), while the coldest was 1976 (46°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 24% of September 1st dates historically, with the wettest September 1st recording 3.07" of rain. The last decade has been 2.5°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.5°F cooler on this date compared to 20-30 years ago.
Planning for September 1st in Isle Royale? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 79°F | 54°F | 0" | -- |
| 2024 | 67°F | 48°F | 0" | -- |
| 2023 | 82°F | 57°F | 0" | -- |
| 2022 | 86°F | 55°F | 0" | -- |
| 2021 | 72°F | 45°F | 0" | -- |
| 2020 | 68°F | 52°F | 0" | -- |
| 2019 | 70°F | 48°F | 0" | -- |
| 2018 | 77°F | 61°F | 1.88" | -- |
| 2017 | 66°F | 39°F | 0" | -- |
| 2016 | 68°F | 44°F | 0" | -- |
| 2015 | 81°F | 64°F | 0" | -- |
| 2014 | 68°F | 59°F | 0.25" | -- |
| 2013 | 68°F | 50°F | 1.35" | -- |
| 2012 | 78°F | 47°F | 0" | -- |
| 2011 | 84°F | 58°F | 0" | -- |
| 2010 | 71°F | 48°F | 0" | -- |
| 2009 | 70°F | 48°F | 0" | -- |
| 2008 | 88°F | 65°F | 0" | -- |
| 2007 | 76°F | 49°F | 0" | -- |
| 2006 | 72°F | 45°F | 0" | -- |
| 2005 | 72°F | 57°F | 0.05" | -- |
| 2004 | 58°F | 51°F | 0" | -- |
| 2003 | 75°F | 52°F | 0" | -- |
| 2002 | 82°F | 63°F | 0" | 0" |
| 2001 | 71°F | 41°F | 0" | 0" |
| 2000 | 67°F | 50°F | 0.91" | 0" |
| 1999 | 85°F | 60°F | 0" | 0" |
| 1998 | 75°F | 57°F | 0.03" | 0" |
| 1997 | 79°F | 59°F | 0" | 0" |
| 1996 | 82°F | 57°F | 0" | 0" |
| 1995 | 72°F | 53°F | 0.03" | 0" |
| 1994 | 63°F | 42°F | 0" | 0" |
| 1993 | 74°F | 46°F | 0" | 0" |
| 1992 | 67°F | 49°F | 0" | 0" |
| 1991 | 68°F | 43°F | 0" | 0" |
| 1990 | 76°F | 62°F | 0" | 0" |
| 1989 | 67°F | 51°F | 0" | 0" |
| 1988 | 73°F | 62°F | 0.56" | 0" |
| 1983 | 81°F | 58°F | 0" | 0" |
| 1981 | 70°F | 52°F | 0.51" | 0" |
| 1980 | 62°F | 55°F | 1.14" | 0" |
| 1979 | 83°F | 63°F | 3.07" | 0" |
| 1978 | 79°F | 56°F | 0" | 0" |
| 1977 | 63°F | 54°F | 0" | 0" |
| 1976 | 52°F | 40°F | 0" | 0" |
| 1975 | 73°F | 53°F | 0" | 0" |
| 1974 | 58°F | 39°F | 0" | 0" |
| 1973 | 87°F | 70°F | 0" | 0" |
| 1972 | 63°F | 51°F | 0" | 0" |
| 1971 | 80°F | 55°F | 0.03" | 0" |