Weather on August 17 at Indiana Dunes
Indiana Dunes National Park
Based on 55 years of data from Gary, IN
Planning Your Visit
August 17th in Indiana Dunes National Park (via Gary, IN) typically brings warm summer weather, with average highs around 82°F and lows near 61°F. Over 55 years of records, the warmest August 17th was in 1988 (88°F average), while the coldest was 1981 (57°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 31% of August 17th dates historically, with the wettest August 17th recording 5.59" of rain. The last decade has been 4.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.1°F warmer on this date compared to 20-30 years ago.
Planning for August 17th in Indiana Dunes? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 95°F | 68°F | -- | 0" |
| 2024 | 86°F | 67°F | -- | 0" |
| 2023 | 80°F | 63°F | 0" | 0" |
| 2022 | 77°F | 57°F | 0" | 0" |
| 2021 | 77°F | 61°F | 0" | 0" |
| 2020 | 81°F | 63°F | -- | -- |
| 2019 | 78°F | 67°F | -- | -- |
| 2018 | 82°F | 67°F | 0.28" | -- |
| 2017 | 89°F | 71°F | 0.18" | 0" |
| 2016 | 81°F | 67°F | 0" | 0" |
| 2015 | 89°F | 68°F | 0" | 0" |
| 2014 | 79°F | 63°F | 0" | 0" |
| 2013 | 79°F | 56°F | 0" | 0" |
| 2012 | 70°F | 63°F | 0.51" | 0" |
| 2011 | 80°F | 58°F | 0" | 0" |
| 2010 | 78°F | 61°F | 0" | 0" |
| 2009 | 91°F | 69°F | 0.18" | 0" |
| 2008 | 79°F | 58°F | 0" | 0" |
| 2007 | 77°F | 60°F | 0" | 0" |
| 2006 | 78°F | 59°F | 0" | 0" |
| 2005 | 80°F | 59°F | 0" | 0" |
| 2004 | 76°F | 59°F | 0" | 0" |
| 2003 | 89°F | 69°F | 0" | 0" |
| 2002 | 77°F | 69°F | 0.81" | 0" |
| 2001 | 70°F | 61°F | 0.56" | 0" |
| 2000 | 74°F | 62°F | 1.07" | 0" |
| 1999 | 81°F | 50°F | 0" | 0" |
| 1998 | 84°F | 64°F | 0" | 0" |
| 1997 | 74°F | 59°F | 0" | 0" |
| 1996 | 78°F | 60°F | -- | 0" |
| 1995 | 89°F | 72°F | 0" | 0" |
| 1994 | 78°F | 55°F | 0" | 0" |
| 1993 | 80°F | 62°F | 0" | 0" |
| 1992 | 77°F | 47°F | 0" | 0" |
| 1991 | 89°F | 69°F | 0.64" | 0" |
| 1990 | 81°F | 68°F | 0.97" | 0" |
| 1989 | 78°F | 55°F | 0" | 0" |
| 1988 | 101°F | 75°F | 0" | 0" |
| 1987 | 94°F | 57°F | 4.93" | 0" |
| 1986 | 84°F | 61°F | 0" | 0" |
| 1985 | 85°F | 64°F | 0" | 0" |
| 1984 | 86°F | 67°F | 0.1" | 0" |
| 1983 | 96°F | 56°F | 5.59" | 0" |
| 1982 | 80°F | 47°F | 0" | 0" |
| 1981 | 73°F | 41°F | 0" | 0" |
| 1980 | 76°F | 56°F | 0.53" | 0" |
| 1979 | 70°F | -- | 3.43" | 0" |
| 1978 | 83°F | 61°F | 0.1" | 0" |
| 1977 | 83°F | 62°F | 0" | 0" |
| 1976 | 80°F | 46°F | 0" | 0" |
| 1975 | 81°F | 65°F | 0" | 0" |
| 1974 | 85°F | 61°F | 0.81" | 0" |
| 1973 | 85°F | 59°F | 0.25" | 0" |
| 1972 | 93°F | 73°F | 0" | 0" |
| 1971 | 81°F | 52°F | 0" | 0" |