Weather on October 15 at Indiana Dunes
Indiana Dunes National Park
Based on 55 years of data from Gary, IN
Planning Your Visit
October 15th in Indiana Dunes National Park (via Gary, IN) typically brings mild fall weather, with average highs around 65°F and lows near 46°F. Over 55 years of records, the warmest October 15th was in 1975 (72°F average), while the coldest was 2009 (41°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 33% of October 15th dates historically, with the wettest October 15th recording 4.95" of rain. The last decade has been 1.2°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.2°F cooler on this date compared to 20-30 years ago.
Planning for October 15th in Indiana Dunes? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 71°F | 58°F | -- | -- |
| 2024 | 56°F | 42°F | -- | 0" |
| 2023 | 54°F | 47°F | -- | 0" |
| 2022 | 61°F | 34°F | 0.33" | 0" |
| 2021 | 69°F | 55°F | 0.1" | 0" |
| 2020 | 76°F | 47°F | 0.05" | 0" |
| 2019 | 67°F | 41°F | -- | -- |
| 2018 | 62°F | 34°F | -- | -- |
| 2017 | 64°F | 57°F | -- | 0" |
| 2016 | 67°F | 51°F | 0" | 0" |
| 2015 | 60°F | 43°F | 0" | 0" |
| 2014 | 66°F | 53°F | 1.22" | 0" |
| 2013 | 63°F | 49°F | 0" | 0" |
| 2012 | 69°F | 47°F | 1.12" | 0" |
| 2011 | 61°F | 48°F | 0" | 0" |
| 2010 | 63°F | 54°F | 0" | 0" |
| 2009 | 46°F | 35°F | 0.43" | 0" |
| 2008 | 60°F | 51°F | 0" | 0" |
| 2007 | 77°F | 55°F | -- | -- |
| 2006 | 53°F | 30°F | 0" | 0" |
| 2005 | 75°F | 55°F | 0" | 0" |
| 2004 | 60°F | 48°F | 4.95" | 0" |
| 2003 | 56°F | 41°F | 2.59" | 0" |
| 2002 | 59°F | 36°F | 0" | 0" |
| 2001 | 62°F | 44°F | 0.13" | 0" |
| 2000 | 76°F | 56°F | 0" | 0" |
| 1999 | 78°F | 53°F | 0" | 0" |
| 1998 | 68°F | 47°F | 0" | 0" |
| 1997 | 58°F | 35°F | 0" | 0" |
| 1996 | 78°F | 51°F | 0" | 0" |
| 1995 | 52°F | 34°F | 0.2" | 0" |
| 1994 | 68°F | 50°F | 0" | 0" |
| 1993 | 70°F | 50°F | 0" | 0" |
| 1992 | 56°F | 51°F | 0.76" | 0" |
| 1991 | 50°F | 34°F | 0" | 0" |
| 1990 | 68°F | 42°F | 0.81" | 0" |
| 1989 | 85°F | 52°F | 0" | 0" |
| 1988 | 76°F | 56°F | 0" | 0" |
| 1987 | 75°F | 41°F | 0" | 0" |
| 1986 | 51°F | 34°F | 0" | 0" |
| 1985 | 65°F | 49°F | 0.33" | 0" |
| 1984 | 74°F | 61°F | 1.09" | 0" |
| 1983 | 74°F | 37°F | 0" | 0" |
| 1982 | 60°F | 43°F | 0.03" | 0" |
| 1981 | 62°F | 53°F | 0.03" | 0" |
| 1980 | 65°F | 44°F | 0" | 0" |
| 1979 | 63°F | 32°F | 0" | 0" |
| 1978 | 60°F | 34°F | 0.08" | 0" |
| 1977 | 65°F | 43°F | 0" | 0" |
| 1976 | 68°F | 51°F | 0" | 0" |
| 1975 | 84°F | 60°F | 0.64" | 0" |
| 1974 | 59°F | 39°F | 0" | 0" |
| 1973 | 75°F | 55°F | 0" | 0" |
| 1972 | 57°F | 35°F | 0" | 0" |
| 1971 | 81°F | 49°F | 0" | 0" |