Weather on September 1 at Indiana Dunes
Indiana Dunes National Park
Based on 55 years of data from Gary, IN
Planning Your Visit
September 1st in Indiana Dunes National Park (via Gary, IN) typically brings warm fall weather, with average highs around 81°F and lows near 60°F. Over 55 years of records, the warmest September 1st was in 2010 (81°F average), while the coldest was 2009 (56°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 15% of September 1st dates historically, with the wettest September 1st recording 5.84" 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 September 1st in Indiana Dunes? Stay hydrated and seek shade during peak afternoon hours.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 76°F | 49°F | 0" | 0" |
| 2024 | 81°F | 62°F | 0" | 0" |
| 2023 | 72°F | 54°F | 0" | 0" |
| 2022 | 83°F | 62°F | 0" | 0" |
| 2021 | 80°F | 63°F | 0" | 0" |
| 2020 | 84°F | 65°F | 0" | 0" |
| 2019 | 75°F | 59°F | -- | -- |
| 2018 | 85°F | 70°F | -- | -- |
| 2017 | 71°F | 50°F | 0" | 0" |
| 2016 | 76°F | 60°F | 0" | 0" |
| 2015 | 81°F | 67°F | 0" | 0" |
| 2014 | 84°F | 68°F | 0" | 0" |
| 2013 | 74°F | 66°F | 0.51" | 0" |
| 2012 | 88°F | 71°F | 0.03" | 0" |
| 2011 | 88°F | 61°F | 0" | 0" |
| 2010 | 90°F | 72°F | 0" | 0" |
| 2009 | 66°F | 47°F | 0" | 0" |
| 2008 | 89°F | 63°F | 0" | 0" |
| 2007 | 75°F | 56°F | 0" | 0" |
| 2006 | 72°F | 59°F | 0" | 0" |
| 2005 | 75°F | 59°F | 0" | 0" |
| 2004 | 75°F | 56°F | 0" | 0" |
| 2003 | 68°F | 57°F | 2.57" | 0" |
| 2002 | 82°F | 62°F | 0" | 0" |
| 2001 | 75°F | 51°F | 0" | 0" |
| 2000 | 91°F | 68°F | 0" | 0" |
| 1999 | 78°F | 58°F | 0" | 0" |
| 1998 | 77°F | 58°F | 0" | 0" |
| 1997 | 84°F | 62°F | 0" | 0" |
| 1996 | 81°F | 57°F | 0" | 0" |
| 1995 | 85°F | 67°F | -- | 0" |
| 1994 | 69°F | 52°F | 0" | 0" |
| 1993 | 75°F | 53°F | 0" | 0" |
| 1992 | 77°F | 48°F | 0" | 0" |
| 1991 | 77°F | 53°F | 0" | 0" |
| 1990 | 88°F | 66°F | 0" | 0" |
| 1989 | 80°F | 57°F | 5.84" | 0" |
| 1988 | 83°F | 58°F | 0" | 0" |
| 1987 | 76°F | 49°F | 0" | 0" |
| 1986 | 81°F | 52°F | 0" | 0" |
| 1985 | 84°F | 62°F | 0" | 0" |
| 1984 | 90°F | 56°F | 0.84" | 0" |
| 1983 | 85°F | 60°F | 0" | 0" |
| 1982 | 83°F | 62°F | 0.89" | 0" |
| 1981 | 83°F | 66°F | 0" | 0" |
| 1980 | 84°F | 65°F | 4.29" | 0" |
| 1979 | 86°F | 65°F | 0" | 0" |
| 1978 | 84°F | 55°F | 0" | 0" |
| 1977 | 90°F | 68°F | 3.86" | 0" |
| 1976 | 87°F | 62°F | 0" | 0" |
| 1975 | 83°F | 61°F | 0" | 0" |
| 1974 | 80°F | 52°F | 0" | 0" |
| 1973 | 90°F | 71°F | 0" | 0" |
| 1972 | 83°F | 63°F | 0" | 0" |
| 1971 | 84°F | 59°F | 0" | 0" |