Weather on September 19 at Isle Royale
Isle Royale National Park
Based on 50 years of data from Houghton, MI
Planning Your Visit
September 19th in Isle Royale National Park (via Houghton, MI) typically brings mild fall weather, with average highs around 66°F and lows near 49°F. Over 50 years of records, the warmest September 19th was in 2000 (73°F average), while the coldest was 1991 (39°F) — a 34°F range across recorded history. Precipitation has occurred on 58% of recorded September 19th dates, with snow falling 2% of the time. 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 19th 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 | 62°F | 54°F | 0.03" | -- |
| 2024 | 79°F | 59°F | 0.03" | -- |
| 2023 | 67°F | 46°F | 0" | -- |
| 2022 | 75°F | 59°F | 0.18" | -- |
| 2021 | 87°F | 57°F | 0" | -- |
| 2020 | 63°F | 43°F | 0" | -- |
| 2019 | 77°F | 62°F | 0" | -- |
| 2018 | 57°F | 41°F | 0.03" | -- |
| 2017 | 68°F | 56°F | 0" | -- |
| 2016 | 72°F | 62°F | 0.23" | -- |
| 2015 | 63°F | 50°F | 0" | -- |
| 2014 | 65°F | 46°F | 0.3" | -- |
| 2013 | 78°F | 61°F | 0.15" | -- |
| 2012 | 58°F | 36°F | 0.33" | -- |
| 2011 | 63°F | 51°F | 0.08" | -- |
| 2010 | 55°F | 35°F | 0" | -- |
| 2009 | 75°F | 41°F | 0" | -- |
| 2008 | 79°F | 57°F | 0" | -- |
| 2007 | 66°F | 51°F | 0.84" | -- |
| 2006 | 48°F | 43°F | 1.42" | -- |
| 2005 | 61°F | 53°F | 1.07" | -- |
| 2004 | 78°F | 52°F | 0" | -- |
| 2003 | 62°F | 49°F | 0.91" | -- |
| 2002 | 71°F | 59°F | 1.73" | 0" |
| 2001 | 63°F | 55°F | 0" | 0" |
| 2000 | 87°F | 59°F | 0.1" | 0" |
| 1999 | 75°F | 53°F | 1.14" | 0" |
| 1998 | 79°F | 57°F | 1.17" | 0" |
| 1997 | 67°F | 55°F | 4.7" | 0" |
| 1996 | 71°F | 40°F | 0" | 0" |
| 1995 | 67°F | 45°F | 0.38" | 0" |
| 1994 | 77°F | 48°F | 0" | 0" |
| 1993 | 56°F | 33°F | 0" | 0" |
| 1992 | 56°F | 42°F | 0" | 0" |
| 1991 | 43°F | 35°F | 0.43" | 0.2" |
| 1990 | 61°F | 49°F | 0.05" | 0" |
| 1989 | 77°F | 59°F | 0.03" | 0" |
| 1988 | 67°F | 60°F | 0.38" | 0" |
| 1983 | 56°F | 46°F | 0.81" | 0" |
| 1981 | 59°F | 44°F | 0" | 0" |
| 1980 | 59°F | 38°F | 1.19" | 0" |
| 1979 | 60°F | 36°F | 0" | 0" |
| 1978 | 75°F | 52°F | 0" | 0" |
| 1977 | 55°F | 41°F | 0.41" | 0" |
| 1976 | 68°F | 45°F | 3.51" | 0" |
| 1975 | 64°F | 44°F | 0" | 0" |
| 1974 | 58°F | 43°F | 0" | 0" |
| 1973 | 53°F | 39°F | 0.05" | 0" |
| 1972 | 64°F | 46°F | 0" | 0" |
| 1971 | 55°F | 38°F | 0.05" | 0" |