Weather on September 3 at Isle Royale
Isle Royale National Park
Based on 50 years of data from Houghton, MI
Planning Your Visit
September 3rd in Isle Royale National Park (via Houghton, MI) typically brings pleasant fall weather, with average highs around 71°F and lows near 53°F. Over 50 years of records, the warmest September 3rd was in 1971 (80°F average), while the coldest was 1974 (48°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 42% of September 3rd dates historically, with the wettest September 3rd recording 3.05" of rain. The last decade has been 2.3°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.3°F cooler on this date compared to 20-30 years ago.
Planning for September 3rd 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 | 63°F | 45°F | 2.21" | -- |
| 2024 | 77°F | 49°F | 0" | -- |
| 2023 | 87°F | 69°F | 0" | -- |
| 2022 | 62°F | 41°F | 0" | -- |
| 2021 | 74°F | 57°F | 0.05" | -- |
| 2020 | 63°F | 54°F | 0.41" | -- |
| 2019 | 60°F | 50°F | 2.95" | -- |
| 2018 | 75°F | 54°F | 0" | -- |
| 2017 | 76°F | 54°F | 0.36" | -- |
| 2016 | 76°F | 52°F | 0" | -- |
| 2015 | 78°F | 60°F | 0" | -- |
| 2014 | 79°F | 55°F | 0.25" | -- |
| 2013 | 70°F | 50°F | 0" | -- |
| 2012 | 78°F | 55°F | 1.73" | -- |
| 2011 | 73°F | 53°F | 0.03" | -- |
| 2010 | 58°F | 46°F | 3.05" | -- |
| 2009 | 72°F | 47°F | 0" | -- |
| 2008 | 61°F | 43°F | 0" | -- |
| 2007 | 72°F | 46°F | 0.66" | -- |
| 2006 | 74°F | 54°F | 0" | -- |
| 2005 | 68°F | 45°F | 0" | -- |
| 2004 | 83°F | 59°F | 0" | -- |
| 2003 | 65°F | 53°F | 0.03" | -- |
| 2002 | 67°F | 60°F | 0" | -- |
| 2001 | 83°F | 64°F | 0" | 0" |
| 2000 | 58°F | 53°F | 0.13" | 0" |
| 1999 | 90°F | 64°F | 0" | 0" |
| 1998 | 66°F | 55°F | 0" | 0" |
| 1997 | 63°F | 41°F | 0" | 0" |
| 1996 | 84°F | 64°F | 0.81" | 0" |
| 1995 | 76°F | 57°F | 0.41" | 0" |
| 1994 | 67°F | 44°F | 0" | 0" |
| 1993 | 63°F | 51°F | 0" | 0" |
| 1992 | 64°F | 49°F | 0" | 0" |
| 1991 | 70°F | 53°F | 1.6" | 0" |
| 1990 | 74°F | 48°F | 0.23" | 0" |
| 1989 | 76°F | 51°F | 0" | 0" |
| 1988 | 66°F | 56°F | 0.58" | 0" |
| 1983 | 82°F | 67°F | 0" | 0" |
| 1981 | 72°F | 47°F | 0" | 0" |
| 1980 | 68°F | 51°F | 0.64" | 0" |
| 1979 | 57°F | 45°F | 0.03" | 0" |
| 1978 | 66°F | 52°F | 0" | 0" |
| 1977 | 71°F | 46°F | 0" | 0" |
| 1976 | 77°F | 55°F | 0" | 0" |
| 1975 | 63°F | 49°F | 1.88" | 0" |
| 1974 | 58°F | 39°F | 0" | 0" |
| 1973 | 80°F | 68°F | 0.43" | 0" |
| 1972 | 65°F | 40°F | 0" | 0" |
| 1971 | 91°F | 70°F | 0" | 0" |