Weather on September 13 at Isle Royale
Isle Royale National Park
Based on 51 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 48°F. Over 51 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 39% of September 13th dates historically, with the wettest September 13th recording 0.96" of rain. The last decade has been 1.4°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.4°F cooler on this date compared to 20-30 years ago.
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 |
|---|---|---|---|---|
| 2026 | 60°F | 41°F | 0.03" | -- |
| 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 | 0.09" | -- |
| 2019 | 66°F | 53°F | 0.29" | -- |
| 2018 | 82°F | 59°F | 0" | -- |
| 2017 | 82°F | 52°F | 0" | -- |
| 2016 | 66°F | 52°F | 0.12" | -- |
| 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 | 0.25" | -- |
| 2010 | 60°F | 47°F | 0" | -- |
| 2009 | 73°F | 55°F | 0" | -- |
| 2008 | 68°F | 46°F | 0.41" | -- |
| 2007 | 63°F | 45°F | 0.17" | -- |
| 2006 | 67°F | 40°F | 0" | -- |
| 2005 | 71°F | 60°F | 0.19" | -- |
| 2004 | 82°F | 54°F | 0" | -- |
| 2003 | 71°F | 59°F | 0.08" | -- |
| 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 | 0.15" | 0" |
| 1998 | 68°F | 59°F | 0.37" | 0" |
| 1997 | 73°F | 46°F | 0" | 0" |
| 1996 | 53°F | 44°F | 0" | 0" |
| 1995 | 67°F | 51°F | 0.24" | 0" |
| 1994 | 77°F | 62°F | 0.09" | 0" |
| 1993 | 67°F | 48°F | 0.63" | 0" |
| 1992 | 67°F | 60°F | 0.04" | 0" |
| 1991 | 68°F | 53°F | 0" | 0" |
| 1990 | 85°F | 52°F | 0.96" | 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 | 0.67" | 0" |
| 1979 | 58°F | 48°F | 0" | 0" |
| 1978 | 51°F | 48°F | 0.35" | 0" |
| 1977 | 62°F | 44°F | 0" | 0" |
| 1976 | 85°F | 52°F | 0.07" | 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 | 0.62" | 0" |
| 1971 | 70°F | 53°F | 0" | 0" |