Weather on July 20 at Isle Royale
Isle Royale National Park
Based on 50 years of data from Houghton, MI
Planning Your Visit
July 20th in Isle Royale National Park (via Houghton, MI) typically brings pleasant summer weather, with average highs around 76°F and lows near 56°F. Over 50 years of records, the warmest July 20th was in 2011 (78°F average), while the coldest was 1992 (51°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 34% of July 20th dates historically, with the wettest July 20th recording 2.16" of rain. The last decade has been 2.7°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.7°F cooler on this date compared to 20-30 years ago.
Planning for July 20th 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 | 76°F | 52°F | 0" | -- |
| 2024 | 75°F | 53°F | 1.02" | -- |
| 2023 | 69°F | 57°F | 0.51" | -- |
| 2022 | 74°F | 63°F | 0.41" | -- |
| 2021 | 68°F | 46°F | 0" | -- |
| 2020 | 68°F | 50°F | 0" | -- |
| 2019 | 76°F | 59°F | 0" | -- |
| 2018 | 73°F | 63°F | 0.41" | -- |
| 2017 | 78°F | 55°F | 0" | -- |
| 2016 | 87°F | 61°F | 0" | -- |
| 2015 | 72°F | 68°F | 0" | -- |
| 2014 | 83°F | 65°F | 0" | -- |
| 2013 | 64°F | 46°F | 0" | -- |
| 2012 | 83°F | 52°F | 0" | -- |
| 2011 | 91°F | 64°F | 1.37" | -- |
| 2010 | 73°F | 56°F | 0.25" | -- |
| 2009 | 75°F | 48°F | 0" | -- |
| 2008 | 69°F | 54°F | 0.05" | -- |
| 2007 | 71°F | 47°F | 0" | -- |
| 2006 | 75°F | 58°F | 0" | -- |
| 2005 | 85°F | 56°F | 0" | -- |
| 2004 | 66°F | 56°F | 0" | -- |
| 2003 | 79°F | 60°F | 0" | 0" |
| 2002 | 88°F | 59°F | 0" | 0" |
| 2001 | 85°F | 65°F | 0" | 0" |
| 2000 | 73°F | 57°F | 0.3" | 0" |
| 1999 | 82°F | 55°F | 0" | 0" |
| 1998 | 84°F | 64°F | 0" | 0" |
| 1997 | 73°F | 54°F | 0" | 0" |
| 1996 | 72°F | 46°F | 0" | 0" |
| 1995 | 76°F | 54°F | 1.09" | 0" |
| 1994 | 84°F | 64°F | 0.61" | 0" |
| 1993 | 66°F | 55°F | 0" | 0" |
| 1992 | 57°F | 45°F | 0" | 0" |
| 1991 | 76°F | 63°F | 0.41" | 0" |
| 1990 | 73°F | 57°F | 0" | 0" |
| 1989 | 80°F | 55°F | 0" | 0" |
| 1988 | 79°F | 57°F | 0.2" | 0" |
| 1983 | 82°F | 62°F | 0" | 0" |
| 1981 | 68°F | 49°F | 0.13" | 0" |
| 1980 | 75°F | 62°F | 0.56" | 0" |
| 1979 | 81°F | 58°F | 0" | 0" |
| 1978 | 71°F | 54°F | 0" | 0" |
| 1977 | 83°F | 60°F | 2.16" | 0" |
| 1976 | 76°F | 60°F | 0.3" | 0" |
| 1975 | 70°F | 53°F | 0" | 0" |
| 1974 | 76°F | 48°F | 0" | 0" |
| 1973 | 72°F | 55°F | 0" | 0" |
| 1972 | 80°F | 61°F | 0.58" | 0" |
| 1971 | 74°F | 54°F | 0" | 0" |