Weather on September 25 at Indiana Dunes
Indiana Dunes National Park
Based on 55 years of data from Gary, IN
Planning Your Visit
September 25th in Indiana Dunes National Park (via Gary, IN) typically brings pleasant fall weather, with average highs around 72°F and lows near 51°F. Over 55 years of records, the warmest September 25th was in 2007 (81°F average), while the coldest was 2001 (50°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 36% of September 25th dates historically, with the wettest September 25th recording 1.6" of rain. The last decade has been 9.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 9.0°F warmer on this date compared to 20-30 years ago.
Planning for September 25th 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 | 73°F | 64°F | 0" | 0" |
| 2024 | 71°F | 61°F | 1.32" | 0" |
| 2023 | 75°F | 59°F | 0" | 0" |
| 2022 | 74°F | 55°F | -- | 0" |
| 2021 | 69°F | 54°F | -- | -- |
| 2020 | 79°F | 53°F | 0" | 0" |
| 2019 | 78°F | 59°F | 0" | 0" |
| 2018 | 72°F | 59°F | 0.61" | -- |
| 2017 | 93°F | 62°F | 0" | 0" |
| 2016 | 76°F | 61°F | 0" | 0" |
| 2015 | 77°F | 55°F | 0" | 0" |
| 2014 | 74°F | 50°F | 0" | 0" |
| 2013 | 71°F | 51°F | 0" | 0" |
| 2012 | 69°F | 40°F | 0" | 0" |
| 2011 | 62°F | 51°F | 0" | 0" |
| 2010 | 70°F | 55°F | 0" | 0" |
| 2009 | 71°F | 62°F | 0" | 0" |
| 2008 | 82°F | 64°F | 0" | 0" |
| 2007 | 91°F | 71°F | 0" | 0" |
| 2006 | 61°F | 45°F | 0" | 0" |
| 2005 | 77°F | 62°F | 0" | 0" |
| 2004 | 78°F | 60°F | 0" | 0" |
| 2003 | 69°F | 49°F | 0.1" | 0" |
| 2002 | 60°F | 45°F | 0" | 0" |
| 2001 | 56°F | 44°F | 0.91" | 0" |
| 2000 | 59°F | 47°F | 0" | 0" |
| 1999 | 64°F | 43°F | 0" | 0" |
| 1998 | 76°F | 46°F | 0.08" | 0" |
| 1997 | 76°F | 49°F | 0" | 0" |
| 1996 | 65°F | 44°F | 0" | 0" |
| 1995 | 70°F | 35°F | -- | 0" |
| 1994 | 70°F | 47°F | 0.64" | 0" |
| 1993 | 67°F | 50°F | 1.6" | 0" |
| 1992 | 74°F | 37°F | 0" | 0" |
| 1991 | 64°F | 39°F | 0.08" | 0" |
| 1990 | 77°F | 51°F | 0" | 0" |
| 1989 | 67°F | 37°F | 0" | 0" |
| 1988 | 75°F | 43°F | 0" | 0" |
| 1987 | 75°F | 39°F | 0" | 0" |
| 1986 | 90°F | 69°F | 0.48" | 0" |
| 1985 | 63°F | 40°F | 0.08" | 0" |
| 1984 | 84°F | 54°F | 0.58" | 0" |
| 1983 | 69°F | 50°F | 0.56" | 0" |
| 1982 | 63°F | 52°F | 0.18" | 0" |
| 1981 | 75°F | 54°F | 0.05" | 0" |
| 1980 | 74°F | 51°F | 0" | 0" |
| 1979 | 73°F | 44°F | 0.18" | 0" |
| 1978 | 72°F | 47°F | 0" | 0" |
| 1977 | 79°F | 55°F | 0.2" | 0" |
| 1976 | 68°F | 44°F | 0" | 0" |
| 1975 | 63°F | 49°F | 0.1" | 0" |
| 1974 | 70°F | 51°F | 0" | 0" |
| 1973 | 84°F | 58°F | 0.38" | 0" |
| 1972 | 76°F | 65°F | 1.12" | 0" |
| 1971 | 65°F | 39°F | 0.74" | 0" |