Weather on December 15 at Indiana Dunes
Indiana Dunes National Park
Based on 55 years of data from Gary, IN
Planning Your Visit
December 15th in Indiana Dunes National Park (via Gary, IN) typically brings cold winter weather, with average highs around 39°F and lows near 24°F. Over 55 years of records, the warmest December 15th was in 2011 (50°F average), while the coldest was 1989 (0°F) — a 50°F range across recorded history. Precipitation has occurred on 42% of recorded December 15th dates, with snow falling 7% of the time (heaviest snowfall: 2"). 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 December 15th in Indiana Dunes? Bundle up with warm layers and protect extremities from the cold. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 18°F | 5°F | -- | -- |
| 2024 | 44°F | 33°F | -- | 0" |
| 2023 | 52°F | 27°F | 0" | 0" |
| 2022 | 42°F | 33°F | 1.55" | 0" |
| 2021 | 55°F | 38°F | 0.23" | 0" |
| 2020 | 33°F | 21°F | 0" | 0" |
| 2019 | 28°F | 23°F | -- | -- |
| 2018 | 50°F | 34°F | -- | -- |
| 2017 | 31°F | 13°F | 0.05" | 0.3" |
| 2016 | 23°F | 1°F | 0" | 0" |
| 2015 | 54°F | 41°F | 0.48" | 0" |
| 2014 | 52°F | 42°F | 0" | 0" |
| 2013 | 29°F | 17°F | -- | -- |
| 2012 | 51°F | 29°F | 0" | 0" |
| 2011 | 57°F | 43°F | 2.44" | 0" |
| 2010 | 22°F | 0°F | 0" | 0" |
| 2009 | 40°F | 26°F | 0.05" | 0" |
| 2008 | 52°F | 8°F | 0.64" | 0" |
| 2007 | 30°F | 26°F | 0" | 0" |
| 2006 | 54°F | 39°F | 0" | 0" |
| 2005 | 35°F | 26°F | 0.1" | 0.4" |
| 2004 | 26°F | 15°F | 0" | 0" |
| 2003 | 31°F | 24°F | 0" | 0" |
| 2002 | 41°F | 30°F | 0" | 0" |
| 2001 | 41°F | 37°F | 0.71" | 0" |
| 2000 | 29°F | 7°F | 0.13" | 0.5" |
| 1999 | 39°F | 26°F | 0" | 0" |
| 1998 | 53°F | 23°F | 0" | 0" |
| 1997 | 40°F | 28°F | 0" | 0" |
| 1996 | 42°F | 27°F | 0.46" | -- |
| 1995 | 51°F | 25°F | -- | -- |
| 1994 | 37°F | 29°F | 0" | 0" |
| 1993 | 44°F | 33°F | 0.05" | 0" |
| 1992 | 44°F | 23°F | 0.43" | 0" |
| 1991 | 29°F | 19°F | 0" | 0" |
| 1990 | 35°F | 24°F | 0.66" | 0" |
| 1989 | 3°F | -4°F | 0" | 0" |
| 1988 | 42°F | 21°F | 0" | 0" |
| 1987 | 38°F | 31°F | 2.92" | -- |
| 1986 | 47°F | 19°F | 0" | 0" |
| 1985 | 33°F | 13°F | 0" | 0" |
| 1984 | 48°F | 35°F | 0.15" | 0" |
| 1983 | 35°F | 23°F | 0.18" | 0" |
| 1982 | 40°F | 37°F | 0.05" | 0" |
| 1981 | 34°F | 17°F | 0" | 0" |
| 1980 | 34°F | 21°F | 0" | 0" |
| 1979 | -- | 23°F | 0" | 0" |
| 1978 | 41°F | 19°F | 0" | 0" |
| 1977 | 40°F | 32°F | 0" | 0" |
| 1976 | 42°F | 20°F | 0" | 0" |
| 1975 | 62°F | 32°F | 1.22" | 0" |
| 1974 | 42°F | 37°F | 0.89" | 0" |
| 1973 | 25°F | 21°F | 0.08" | 0" |
| 1972 | 27°F | 20°F | 0.25" | 2" |
| 1971 | 62°F | 31°F | 2.29" | 0" |