Weather on September 27 at Indiana Dunes
Indiana Dunes National Park
Based on 55 years of data from Gary, IN
Planning Your Visit
September 27th in Indiana Dunes National Park (via Gary, IN) typically brings pleasant fall weather, with average highs around 72°F and lows near 52°F. Over 55 years of records, the warmest September 27th was in 2017 (78°F average), while the coldest was 1991 (46°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 20% of September 27th dates historically, with the wettest September 27th recording 3.56" of rain. The last decade has been 5.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.2°F warmer on this date compared to 20-30 years ago.
Planning for September 27th in Indiana Dunes? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 84°F | 61°F | 0" | 0" |
| 2024 | 76°F | -- | 0" | 0" |
| 2023 | 73°F | 62°F | 0.84" | 0" |
| 2022 | 63°F | 52°F | 0" | 0" |
| 2021 | 86°F | 63°F | -- | -- |
| 2020 | 80°F | 55°F | -- | -- |
| 2019 | 70°F | 50°F | 0" | 0" |
| 2018 | 66°F | 44°F | 0" | -- |
| 2017 | 91°F | 65°F | 0" | 0" |
| 2016 | 70°F | 51°F | 0" | 0" |
| 2015 | 79°F | 61°F | 0" | 0" |
| 2014 | 78°F | 55°F | 0" | 0" |
| 2013 | 72°F | 52°F | 0" | 0" |
| 2012 | 64°F | 49°F | 0" | 0" |
| 2011 | 65°F | 54°F | 0.61" | 0" |
| 2010 | 59°F | 44°F | 0" | 0" |
| 2009 | 67°F | 52°F | 0" | 0" |
| 2008 | 72°F | 50°F | 0" | 0" |
| 2007 | 65°F | 49°F | 0" | 0" |
| 2006 | 70°F | 52°F | 0" | 0" |
| 2005 | 69°F | 51°F | 0.03" | 0" |
| 2004 | 69°F | 48°F | 0" | 0" |
| 2003 | 68°F | 48°F | 1.47" | 0" |
| 2002 | 73°F | 57°F | 0" | 0" |
| 2001 | 63°F | 48°F | 0" | 0" |
| 2000 | 67°F | 46°F | 0" | 0" |
| 1999 | 78°F | 62°F | 0" | 0" |
| 1998 | 84°F | 51°F | 0" | 0" |
| 1997 | 76°F | 49°F | 0" | 0" |
| 1996 | 60°F | 47°F | 3.56" | 0" |
| 1995 | 80°F | 49°F | -- | 0" |
| 1994 | 64°F | 49°F | 0.13" | 0" |
| 1993 | 62°F | 48°F | 2.41" | 0" |
| 1992 | 67°F | 50°F | 0.91" | 0" |
| 1991 | 57°F | 36°F | 0" | 0" |
| 1990 | 83°F | 51°F | 0" | 0" |
| 1989 | 69°F | 35°F | 0" | 0" |
| 1988 | 83°F | 55°F | 0" | 0" |
| 1987 | 87°F | 56°F | 0" | 0" |
| 1986 | 85°F | 67°F | 0" | 0" |
| 1985 | 64°F | 46°F | 0.2" | 0" |
| 1984 | 53°F | 43°F | 0.13" | 0" |
| 1983 | 81°F | 49°F | 0" | 0" |
| 1982 | 62°F | 52°F | 0" | 0" |
| 1981 | 71°F | 51°F | 2.06" | 0" |
| 1980 | 68°F | 40°F | 0" | 0" |
| 1979 | 81°F | 48°F | 0" | 0" |
| 1978 | 76°F | 50°F | 0" | 0" |
| 1977 | 79°F | 50°F | 0" | 0" |
| 1976 | 64°F | 56°F | 0" | 0" |
| 1975 | 70°F | 38°F | 0" | 0" |
| 1974 | 80°F | 51°F | 0" | 0" |
| 1973 | 85°F | 67°F | 0" | 0" |
| 1972 | 71°F | 52°F | 0" | 0" |
| 1971 | 85°F | 65°F | 0" | 0" |