Weather on September 14 at Isle Royale
Isle Royale National Park
Based on 50 years of data from Houghton, MI
Planning Your Visit
September 14th in Isle Royale National Park (via Houghton, MI) typically brings mild fall weather, with average highs around 65°F and lows near 48°F. Over 50 years of records, the warmest September 14th was in 1997 (71°F average), while the coldest was 2007 (44°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 38% of September 14th dates historically, with the wettest September 14th recording 2.95" of rain. The last decade has been 1.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.1°F warmer on this date compared to 20-30 years ago.
Planning for September 14th 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 | 72°F | 55°F | 0" | -- |
| 2024 | 76°F | 57°F | 0" | -- |
| 2023 | 70°F | 40°F | 0" | -- |
| 2022 | 61°F | 47°F | 0" | -- |
| 2021 | 62°F | 55°F | 2.95" | -- |
| 2020 | 60°F | 38°F | 0" | -- |
| 2019 | 63°F | 51°F | 0.05" | -- |
| 2018 | 80°F | 62°F | 0" | -- |
| 2017 | 79°F | 58°F | 0" | -- |
| 2016 | 65°F | 44°F | 0" | -- |
| 2015 | 83°F | 53°F | 0" | -- |
| 2014 | 60°F | 44°F | 0.25" | -- |
| 2013 | 70°F | 41°F | 0" | -- |
| 2012 | 60°F | 37°F | 0" | -- |
| 2011 | 51°F | 41°F | 0.1" | -- |
| 2010 | 56°F | 39°F | 0" | -- |
| 2009 | 74°F | 59°F | 0" | -- |
| 2008 | 57°F | 47°F | 0.03" | -- |
| 2007 | 49°F | 39°F | 0.43" | -- |
| 2006 | 73°F | 42°F | 0" | -- |
| 2005 | 64°F | 43°F | 0" | -- |
| 2004 | 72°F | 59°F | 0" | -- |
| 2003 | 60°F | 48°F | 0.94" | -- |
| 2002 | 68°F | 58°F | 0.08" | 0" |
| 2001 | 61°F | 38°F | 0" | 0" |
| 2000 | 72°F | 47°F | 0" | 0" |
| 1999 | 59°F | 40°F | 2.46" | 0" |
| 1998 | 78°F | 64°F | 2.16" | 0" |
| 1997 | 82°F | 61°F | 0" | 0" |
| 1996 | 56°F | 46°F | 0.33" | 0" |
| 1995 | 66°F | 45°F | 0.76" | 0" |
| 1994 | 68°F | 59°F | 0" | 0" |
| 1993 | 48°F | 42°F | 0.74" | 0" |
| 1992 | 71°F | 55°F | 0" | 0" |
| 1991 | 68°F | 53°F | 0.99" | 0" |
| 1990 | 60°F | 45°F | 0.33" | 0" |
| 1989 | 65°F | 44°F | 0" | 0" |
| 1988 | 62°F | 48°F | 0" | 0" |
| 1983 | 57°F | 44°F | 0" | 0" |
| 1981 | 65°F | 48°F | 0" | 0" |
| 1980 | 56°F | 44°F | 0.1" | 0" |
| 1979 | 54°F | 48°F | 0" | 0" |
| 1978 | 61°F | 50°F | 1.52" | 0" |
| 1977 | 66°F | 46°F | 0" | 0" |
| 1976 | 52°F | 48°F | 0.13" | 0" |
| 1975 | 70°F | 33°F | 0" | 0" |
| 1974 | 64°F | 39°F | 0.05" | 0" |
| 1973 | 60°F | 53°F | 0" | 0" |
| 1972 | 65°F | 44°F | 0" | 0" |
| 1971 | 64°F | 50°F | 0" | 0" |