Weather on September 13 at Isle Royale
Isle Royale National Park
Based on 50 years of data from Houghton, MI
Planning Your Visit
September 13th in Isle Royale National Park (via Houghton, MI) typically brings mild fall weather, with average highs around 67°F and lows near 49°F. Over 50 years of records, the warmest September 13th was in 2018 (71°F average), while the coldest was 1975 (42°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 38% of September 13th dates historically, with the wettest September 13th recording 2.44" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for September 13th 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 | 74°F | 57°F | 0" | -- |
| 2024 | 79°F | 54°F | 0" | -- |
| 2023 | 59°F | 40°F | 0" | -- |
| 2022 | 71°F | 51°F | 0" | -- |
| 2021 | 69°F | 43°F | 0" | -- |
| 2020 | 63°F | 43°F | 0.23" | -- |
| 2019 | 66°F | 53°F | 0.74" | -- |
| 2018 | 82°F | 59°F | 0" | -- |
| 2017 | 82°F | 52°F | 0" | -- |
| 2016 | 66°F | 52°F | 0.3" | -- |
| 2015 | 73°F | 40°F | 0" | -- |
| 2014 | 54°F | 32°F | 0" | -- |
| 2013 | 61°F | 34°F | 0" | -- |
| 2012 | 64°F | 45°F | 0" | -- |
| 2011 | 63°F | 49°F | 0.64" | -- |
| 2010 | 60°F | 47°F | 0" | -- |
| 2009 | 73°F | 55°F | 0" | -- |
| 2008 | 68°F | 46°F | 1.04" | -- |
| 2007 | 63°F | 45°F | 0.43" | -- |
| 2006 | 67°F | 40°F | 0" | -- |
| 2005 | 71°F | 60°F | 0.48" | -- |
| 2004 | 82°F | 54°F | 0" | -- |
| 2003 | 71°F | 59°F | 0.2" | -- |
| 2002 | 81°F | 57°F | 0" | 0" |
| 2001 | 66°F | 44°F | 0" | 0" |
| 2000 | 75°F | 51°F | 0" | 0" |
| 1999 | 62°F | 45°F | 0.38" | 0" |
| 1998 | 68°F | 59°F | 0.94" | 0" |
| 1997 | 73°F | 46°F | 0" | 0" |
| 1996 | 53°F | 44°F | 0" | 0" |
| 1995 | 67°F | 51°F | 0.61" | 0" |
| 1994 | 77°F | 62°F | 0.23" | 0" |
| 1993 | 67°F | 48°F | 1.6" | 0" |
| 1992 | 67°F | 60°F | 0.1" | 0" |
| 1991 | 68°F | 53°F | 0" | 0" |
| 1990 | 85°F | 52°F | 2.44" | 0" |
| 1989 | 60°F | 40°F | 0" | 0" |
| 1988 | 66°F | 42°F | 0" | 0" |
| 1983 | 59°F | 42°F | 0" | 0" |
| 1981 | 73°F | 58°F | 0" | 0" |
| 1980 | 61°F | 52°F | 1.7" | 0" |
| 1979 | 58°F | 48°F | 0" | 0" |
| 1978 | 51°F | 48°F | 0.89" | 0" |
| 1977 | 62°F | 44°F | 0" | 0" |
| 1976 | 85°F | 52°F | 0.18" | 0" |
| 1975 | 48°F | 36°F | 0" | 0" |
| 1974 | 55°F | 42°F | 0" | 0" |
| 1973 | 58°F | 42°F | 0" | 0" |
| 1972 | 63°F | 50°F | 1.57" | 0" |
| 1971 | 70°F | 53°F | 0" | 0" |