Weather on September 13 at Indiana Dunes
Indiana Dunes National Park
Based on 56 years of data from Gary, IN
Planning Your Visit
September 13th in Indiana Dunes National Park (via Gary, IN) typically brings pleasant fall weather, with average highs around 78°F and lows near 57°F. Over 56 years of records, the warmest September 13th was in 2026 (80°F average), while the coldest was 1975 (49°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 36% of September 13th dates historically, with the wettest September 13th recording 4.75" of rain. The last decade has been 2.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.1°F warmer on this date compared to 20-30 years ago.
Planning for September 13th in Indiana Dunes? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2026 | 90°F | 70°F | 0" | 0" |
| 2025 | 81°F | 62°F | 0.01" | 0" |
| 2024 | 84°F | 62°F | 0" | 0" |
| 2023 | 67°F | 50°F | 0.01" | 0" |
| 2022 | 61°F | 52°F | 0.2" | 0" |
| 2021 | 88°F | 67°F | -- | -- |
| 2020 | 71°F | 56°F | -- | -- |
| 2019 | 89°F | 69°F | 1.41" | 0" |
| 2018 | 77°F | 55°F | 0" | -- |
| 2017 | 72°F | 56°F | 0.06" | 0" |
| 2016 | 79°F | 61°F | 0" | 0" |
| 2015 | 63°F | 51°F | 0.29" | 0" |
| 2014 | 60°F | 46°F | 0.18" | 0" |
| 2013 | 81°F | 57°F | 0" | 0" |
| 2012 | 84°F | 65°F | 0" | 0" |
| 2011 | 85°F | 63°F | 0" | 0" |
| 2010 | 82°F | 58°F | 0" | 0" |
| 2009 | 76°F | 50°F | 0" | 0" |
| 2008 | 73°F | 68°F | 4.75" | 0" |
| 2007 | 63°F | 51°F | 0" | 0" |
| 2006 | 73°F | 60°F | 1.68" | 0" |
| 2005 | 89°F | 68°F | 0" | 0" |
| 2004 | 84°F | 60°F | 0" | 0" |
| 2003 | 83°F | 63°F | 0" | 0" |
| 2002 | 74°F | 51°F | 0" | 0" |
| 2001 | 83°F | 62°F | 0" | 0" |
| 2000 | 68°F | 48°F | 0.05" | 0" |
| 1999 | 70°F | 46°F | 0" | 0" |
| 1998 | 87°F | 57°F | 0" | 0" |
| 1997 | 77°F | 52°F | 0" | 0" |
| 1996 | 67°F | 47°F | 0" | 0" |
| 1995 | 79°F | 55°F | -- | 0" |
| 1994 | 86°F | 62°F | 0" | 0" |
| 1993 | 81°F | 50°F | 0.05" | 0" |
| 1992 | 77°F | 51°F | 0" | 0" |
| 1991 | 80°F | 64°F | 0.14" | 0" |
| 1990 | 83°F | 63°F | 0" | 0" |
| 1989 | 56°F | 48°F | 0.41" | 0" |
| 1988 | 83°F | 61°F | 0" | 0" |
| 1987 | 80°F | 47°F | 0" | 0" |
| 1986 | 73°F | 46°F | 0" | 0" |
| 1985 | 65°F | 39°F | 0" | 0" |
| 1984 | 83°F | 68°F | 0.16" | 0" |
| 1983 | 73°F | 58°F | 0.05" | 0" |
| 1982 | 84°F | 67°F | 0" | 0" |
| 1981 | 88°F | 62°F | 0" | 0" |
| 1980 | 85°F | -- | 0.11" | 0" |
| 1979 | 84°F | 63°F | 0" | 0" |
| 1978 | 90°F | 63°F | 0.16" | 0" |
| 1977 | 79°F | 57°F | 1.5" | 0" |
| 1976 | 84°F | 54°F | 0" | 0" |
| 1975 | 60°F | 38°F | 0" | 0" |
| 1974 | 80°F | 53°F | 1.35" | 0" |
| 1973 | 75°F | 53°F | 0" | 0" |
| 1972 | 85°F | 67°F | 0.31" | 0" |
| 1971 | 75°F | 53°F | 0" | 0" |