Weather on June 21 at Indiana Dunes
Indiana Dunes National Park
Based on 55 years of data from Gary, IN
Planning Your Visit
June 21st 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 June 21st was in 1988 (86°F average), while the coldest was 1992 (52°F) — a 34°F range across recorded history. Rain or other precipitation has occurred on about 25% of June 21st dates historically, with the wettest June 21st recording 3.73" 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 June 21st in Indiana Dunes? Stay hydrated and seek shade during peak afternoon hours.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 86°F | 73°F | 0" | 0" |
| 2024 | 91°F | 66°F | 0" | 0" |
| 2023 | 75°F | 60°F | 0" | 0" |
| 2022 | 92°F | 67°F | -- | 0" |
| 2021 | 71°F | 51°F | -- | -- |
| 2020 | 78°F | 65°F | -- | -- |
| 2019 | 60°F | 47°F | 0" | 0" |
| 2018 | 92°F | 62°F | 0.3" | -- |
| 2017 | 78°F | 52°F | 0.13" | 0" |
| 2016 | 89°F | 58°F | 0" | 0" |
| 2015 | 81°F | 66°F | 0.53" | 0" |
| 2014 | 84°F | 60°F | 0" | 0" |
| 2013 | 86°F | 68°F | 0" | 0" |
| 2012 | 88°F | 76°F | 0" | 0" |
| 2011 | 80°F | 67°F | 0.05" | 0" |
| 2010 | 78°F | 61°F | 0" | 0" |
| 2009 | 86°F | 67°F | 0" | 0" |
| 2008 | 83°F | 60°F | 0" | 0" |
| 2007 | 82°F | 64°F | 0" | 0" |
| 2006 | 77°F | 69°F | 0" | 0" |
| 2005 | 82°F | 62°F | 0" | 0" |
| 2004 | 73°F | 55°F | 0" | 0" |
| 2003 | 73°F | 47°F | -- | -- |
| 2002 | 91°F | 72°F | 0" | 0" |
| 2001 | 71°F | 57°F | 0.05" | 0" |
| 2000 | 78°F | 67°F | 3.73" | 0" |
| 1999 | 83°F | 64°F | 0" | 0" |
| 1998 | 86°F | 62°F | 0" | 0" |
| 1997 | 85°F | 61°F | -- | 0" |
| 1996 | 82°F | 66°F | -- | 0" |
| 1995 | 85°F | 64°F | -- | 0" |
| 1994 | 90°F | 69°F | 0" | 0" |
| 1993 | 77°F | 63°F | 0" | 0" |
| 1992 | 57°F | 46°F | 0" | 0" |
| 1991 | -- | 67°F | 0" | 0" |
| 1990 | 85°F | 62°F | 0" | 0" |
| 1989 | 72°F | 59°F | 0" | 0" |
| 1988 | 102°F | 69°F | 0.13" | 0" |
| 1987 | 85°F | 68°F | 1.09" | 0" |
| 1986 | 93°F | 63°F | 0" | 0" |
| 1985 | 84°F | 60°F | 0.76" | 0" |
| 1984 | 88°F | 58°F | 0" | 0" |
| 1983 | 92°F | 64°F | 0" | 0" |
| 1982 | 77°F | 51°F | 0" | 0" |
| 1981 | 85°F | 61°F | 0" | 0" |
| 1980 | 81°F | 49°F | 0" | 0" |
| 1979 | 88°F | 64°F | 2.31" | 0" |
| 1978 | 86°F | 59°F | 0.38" | 0" |
| 1977 | 81°F | 49°F | 0" | 0" |
| 1976 | 76°F | 55°F | 0.15" | 0" |
| 1975 | 90°F | 65°F | 0" | 0" |
| 1974 | 90°F | 65°F | 2.03" | 0" |
| 1973 | 81°F | 58°F | 0" | 0" |
| 1972 | 66°F | 49°F | 0" | 0" |
| 1971 | 89°F | 58°F | 0.43" | 0" |