Weather on August 11 at Indiana Dunes
Indiana Dunes National Park
Based on 55 years of data from Gary, IN
Planning Your Visit
August 11th in Indiana Dunes National Park (via Gary, IN) typically brings warm summer weather, with average highs around 81°F and lows near 63°F. Over 55 years of records, the warmest August 11th was in 2025 (85°F average), while the coldest was 1982 (61°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 38% of August 11th dates historically, with the wettest August 11th recording 3.56" of rain. The last decade has been 4.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.5°F warmer on this date compared to 20-30 years ago.
Planning for August 11th 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 | 94°F | 76°F | 0" | 0" |
| 2024 | 75°F | 53°F | 0" | 0" |
| 2023 | 81°F | 65°F | 0.48" | 0" |
| 2022 | 80°F | 63°F | 0" | 0" |
| 2021 | 93°F | 70°F | 1.27" | 0" |
| 2020 | 88°F | 64°F | 1.04" | 0" |
| 2019 | 84°F | 63°F | -- | -- |
| 2018 | 84°F | 65°F | -- | -- |
| 2017 | 83°F | 65°F | 0" | 0" |
| 2016 | 86°F | 66°F | 0" | 0" |
| 2015 | 78°F | 65°F | 0.03" | 0" |
| 2014 | 77°F | 66°F | 1.07" | 0" |
| 2013 | 78°F | 57°F | 0" | 0" |
| 2012 | 71°F | 60°F | 0.05" | 0" |
| 2011 | 73°F | 55°F | 0" | 0" |
| 2010 | 86°F | 73°F | 0" | 0" |
| 2009 | 87°F | 70°F | 0" | 0" |
| 2008 | 70°F | 55°F | 0" | 0" |
| 2007 | 82°F | 64°F | 0" | 0" |
| 2006 | 77°F | 64°F | 0.38" | 0" |
| 2005 | 82°F | 65°F | 0.03" | 0" |
| 2004 | 65°F | 57°F | 0" | 0" |
| 2003 | 77°F | 58°F | 0" | 0" |
| 2002 | 91°F | 69°F | 0" | 0" |
| 2001 | 77°F | 58°F | 0" | 0" |
| 2000 | 78°F | 60°F | 0" | 0" |
| 1999 | 84°F | 64°F | 0" | 0" |
| 1998 | 86°F | 60°F | 0" | 0" |
| 1997 | 80°F | 61°F | 3.56" | 0" |
| 1996 | 75°F | 61°F | -- | 0" |
| 1995 | 90°F | 72°F | 0" | 0" |
| 1994 | 68°F | 57°F | 2.74" | 0" |
| 1993 | 90°F | 64°F | 0" | 0" |
| 1992 | 88°F | 65°F | 0.03" | 0" |
| 1991 | 81°F | 52°F | 0" | 0" |
| 1990 | 80°F | 64°F | 0.1" | 0" |
| 1989 | 81°F | 59°F | 0" | 0" |
| 1988 | 92°F | 71°F | 0" | 0" |
| 1987 | 89°F | 73°F | 0" | 0" |
| 1986 | 83°F | 55°F | 0" | 0" |
| 1985 | 74°F | 56°F | 0" | 0" |
| 1984 | 82°F | 66°F | 0" | 0" |
| 1983 | 89°F | 65°F | 0.3" | 0" |
| 1982 | 73°F | 48°F | 0" | 0" |
| 1981 | 80°F | 59°F | 0" | 0" |
| 1980 | 74°F | 65°F | 2.16" | 0" |
| 1979 | 70°F | 63°F | 0.53" | 0" |
| 1978 | 78°F | 68°F | 0.51" | 0" |
| 1977 | 86°F | 63°F | 0.23" | 0" |
| 1976 | 83°F | 68°F | 0" | 0" |
| 1975 | 90°F | 64°F | 0.43" | 0" |
| 1974 | 86°F | 70°F | 1.83" | 0" |
| 1973 | 86°F | 65°F | 0" | 0" |
| 1972 | 76°F | 56°F | 0.58" | 0" |
| 1971 | 90°F | 60°F | 1.47" | 0" |