Weather on June 18 at Indiana Dunes
Indiana Dunes National Park
Based on 55 years of data from Gary, IN
Planning Your Visit
June 18th in Indiana Dunes National Park (via Gary, IN) typically brings warm summer weather, with average highs around 82°F and lows near 60°F. Over 55 years of records, the warmest June 18th was in 2024 (84°F average), while the coldest was 2019 (55°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 31% of June 18th dates historically, with the wettest June 18th recording 3.71" 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 June 18th 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 | 92°F | 69°F | 0.03" | 0" |
| 2024 | 93°F | 75°F | 0.05" | 0" |
| 2023 | 74°F | 55°F | 0" | 0" |
| 2022 | 78°F | 53°F | -- | 0" |
| 2021 | 87°F | 65°F | 1.4" | 0" |
| 2020 | 80°F | 55°F | 0" | 0" |
| 2019 | 58°F | 53°F | 0" | 0" |
| 2018 | 93°F | 66°F | -- | -- |
| 2017 | 88°F | 68°F | 0.3" | 0" |
| 2016 | 70°F | 64°F | 0" | 0" |
| 2015 | 72°F | 56°F | 0.1" | 0" |
| 2014 | 89°F | 73°F | 0" | 0" |
| 2013 | 87°F | 58°F | 0.1" | 0" |
| 2012 | 83°F | 63°F | 0" | 0" |
| 2011 | 85°F | 58°F | 0" | 0" |
| 2010 | 84°F | 67°F | 0" | 0" |
| 2009 | 66°F | 56°F | 0.25" | 0" |
| 2008 | 72°F | 53°F | 0.03" | 0" |
| 2007 | 90°F | 70°F | 0" | 0" |
| 2006 | 91°F | 72°F | 0" | 0" |
| 2005 | 64°F | 51°F | 0" | 0" |
| 2004 | 83°F | 59°F | 0" | 0" |
| 2003 | 88°F | 56°F | -- | -- |
| 2002 | 74°F | 56°F | 0.05" | 0" |
| 2001 | 86°F | 59°F | 0" | 0" |
| 2000 | 65°F | 56°F | 0" | 0" |
| 1999 | 72°F | 48°F | 0" | 0" |
| 1998 | 90°F | 64°F | 1.09" | 0" |
| 1997 | 70°F | 56°F | 0" | 0" |
| 1996 | 80°F | 68°F | -- | 0" |
| 1995 | 90°F | 64°F | -- | 0" |
| 1994 | 92°F | 69°F | 0" | 0" |
| 1993 | 90°F | 68°F | 3.71" | 0" |
| 1992 | 80°F | 62°F | 0" | 0" |
| 1991 | 84°F | 56°F | 0" | 0" |
| 1990 | 92°F | 64°F | 0" | 0" |
| 1989 | 78°F | 61°F | 0.03" | 0" |
| 1988 | 96°F | 52°F | 0" | 0" |
| 1987 | 93°F | 63°F | 0" | 0" |
| 1986 | 81°F | 49°F | 0" | 0" |
| 1985 | 79°F | 58°F | 0" | 0" |
| 1984 | 94°F | 70°F | 0" | 0" |
| 1983 | 80°F | 55°F | 0" | 0" |
| 1982 | 77°F | 62°F | 0" | 0" |
| 1981 | 85°F | 57°F | 0" | 0" |
| 1980 | 80°F | 37°F | 0" | 0" |
| 1979 | 69°F | 57°F | 0.53" | 0" |
| 1978 | 89°F | 66°F | 2.13" | 0" |
| 1977 | 87°F | 67°F | 0.69" | 0" |
| 1976 | 86°F | 63°F | 0.89" | 0" |
| 1975 | 91°F | 68°F | 0" | 0" |
| 1974 | 81°F | 55°F | 0.1" | 0" |
| 1973 | 84°F | 59°F | 0" | 0" |
| 1972 | 75°F | 45°F | 0" | 0" |
| 1971 | 89°F | 59°F | 0" | 0" |