Weather on August 23 at Indiana Dunes
Indiana Dunes National Park
Based on 55 years of data from Gary, IN
Planning Your Visit
August 23rd in Indiana Dunes National Park (via Gary, IN) typically brings warm summer weather, with average highs around 81°F and lows near 62°F. Over 55 years of records, the warmest August 23rd was in 1975 (80°F average), while the coldest was 2009 (63°F) — a 17°F range across recorded history. Rain or other precipitation has occurred on about 29% of August 23rd dates historically, with the wettest August 23rd recording 3.35" of rain. 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 August 23rd in Indiana Dunes? Stay hydrated and seek shade during peak afternoon hours.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 83°F | 68°F | 0" | 0" |
| 2024 | 76°F | 54°F | 0" | 0" |
| 2023 | 87°F | 71°F | 0" | 0" |
| 2022 | 77°F | 57°F | 0" | 0" |
| 2021 | 88°F | 63°F | -- | -- |
| 2020 | 89°F | 62°F | -- | -- |
| 2019 | 78°F | 55°F | 0" | 0" |
| 2018 | 74°F | 53°F | 0" | -- |
| 2017 | 78°F | 62°F | 0" | 0" |
| 2016 | 78°F | 58°F | 0" | 0" |
| 2015 | 81°F | 63°F | 0" | 0" |
| 2014 | 87°F | 70°F | 0.03" | 0" |
| 2013 | 75°F | 64°F | 0.03" | 0" |
| 2012 | 82°F | 60°F | 0" | 0" |
| 2011 | 78°F | 59°F | 0" | 0" |
| 2010 | 78°F | 64°F | 0" | 0" |
| 2009 | 67°F | 60°F | 0.25" | 0" |
| 2008 | 81°F | 71°F | 0.41" | 0" |
| 2007 | 89°F | 69°F | 3.35" | 0" |
| 2006 | 83°F | 62°F | 0" | 0" |
| 2005 | 72°F | 57°F | 0" | 0" |
| 2004 | 80°F | 50°F | 0" | 0" |
| 2003 | 77°F | 60°F | 0" | 0" |
| 2002 | 78°F | 70°F | 0.41" | 0" |
| 2001 | 87°F | 69°F | 0.46" | 0" |
| 2000 | 83°F | 68°F | 0.2" | 0" |
| 1999 | 76°F | 64°F | 0.03" | 0" |
| 1998 | 87°F | 69°F | 2.24" | 0" |
| 1997 | 75°F | 58°F | 0" | 0" |
| 1996 | 89°F | 54°F | 0.08" | 0" |
| 1995 | 77°F | 59°F | 0" | 0" |
| 1994 | 79°F | 56°F | 0" | 0" |
| 1993 | 90°F | 68°F | 0" | 0" |
| 1992 | 83°F | 63°F | 0" | 0" |
| 1991 | 82°F | 55°F | 0" | 0" |
| 1990 | 79°F | 61°F | 0" | 0" |
| 1989 | 83°F | 69°F | 0.18" | 0" |
| 1988 | 85°F | 64°F | 1.17" | 0" |
| 1987 | 71°F | 65°F | 0" | 0" |
| 1986 | 86°F | 68°F | 0" | 0" |
| 1985 | 81°F | 57°F | 0" | 0" |
| 1984 | 88°F | 65°F | 0" | 0" |
| 1983 | 80°F | 65°F | 0" | 0" |
| 1982 | 80°F | 66°F | 0" | 0" |
| 1981 | 82°F | 60°F | 0" | 0" |
| 1980 | 81°F | 55°F | 0" | 0" |
| 1979 | 82°F | 65°F | 0.38" | 0" |
| 1978 | 89°F | 64°F | 0" | 0" |
| 1977 | 80°F | 62°F | 0" | 0" |
| 1976 | 86°F | 63°F | 0" | 0" |
| 1975 | 91°F | 70°F | 0" | 0" |
| 1974 | 84°F | 67°F | 0" | 0" |
| 1973 | 75°F | 55°F | 0" | 0" |
| 1972 | 81°F | 67°F | 2.49" | 0" |
| 1971 | 91°F | 61°F | 0.64" | 0" |