Weather on March 21 at Indiana Dunes
Indiana Dunes National Park
Based on 56 years of data from Gary, IN
Planning Your Visit
March 21st in Indiana Dunes National Park (via Gary, IN) typically brings chilly spring weather, with average highs around 49°F and lows near 30°F. Over 56 years of records, the warmest March 21st was in 2012 (74°F average), while the coldest was 2013 (21°F) — a 53°F range across recorded history. Precipitation has occurred on 29% of recorded March 21st dates, with snow falling 13% of the time (heaviest snowfall: 5"). 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 March 21st in Indiana Dunes? Bring layers as temperatures can vary throughout the day.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2026 | 72°F | 39°F | -- | 0" |
| 2025 | 43°F | 30°F | 0" | 0" |
| 2024 | 37°F | 19°F | 0" | 0" |
| 2023 | 51°F | 28°F | 0" | 0" |
| 2022 | 62°F | 34°F | -- | 0" |
| 2021 | 67°F | 34°F | -- | -- |
| 2020 | 31°F | 25°F | -- | -- |
| 2019 | 43°F | 34°F | 0.89" | 0" |
| 2018 | 37°F | 27°F | 0" | 0" |
| 2017 | 55°F | 33°F | 0" | 0" |
| 2016 | 43°F | 29°F | 0" | 0" |
| 2015 | 45°F | 36°F | 0" | 0" |
| 2014 | 44°F | 30°F | 0.1" | 1.3" |
| 2013 | 25°F | 18°F | 0" | 0" |
| 2012 | 83°F | 65°F | 0" | 0" |
| 2011 | 61°F | 42°F | 0.91" | 0" |
| 2010 | 35°F | 33°F | 0.23" | 0" |
| 2009 | 39°F | 27°F | 0" | 0" |
| 2008 | 40°F | 29°F | 0.03" | 0.1" |
| 2007 | 50°F | 33°F | 0.58" | 0" |
| 2006 | 36°F | 24°F | 0" | 0" |
| 2005 | 39°F | 24°F | 0" | 0" |
| 2004 | 62°F | 27°F | 0" | 0" |
| 2003 | 69°F | 44°F | 0.33" | 0" |
| 2002 | 40°F | 26°F | 0.25" | 0.4" |
| 2001 | 43°F | 29°F | 0" | 0" |
| 2000 | 54°F | 42°F | 0.1" | 0" |
| 1999 | 53°F | 23°F | 0" | 0" |
| 1998 | 40°F | 25°F | 0" | 0" |
| 1997 | 73°F | 32°F | 0" | 0" |
| 1996 | 26°F | 24°F | -- | -- |
| 1995 | 52°F | 37°F | 0" | 0" |
| 1994 | 61°F | 45°F | 0.25" | 0" |
| 1993 | 40°F | 30°F | 0" | 0" |
| 1992 | 35°F | 18°F | -- | 1.5" |
| 1991 | 71°F | 50°F | 0" | 0" |
| 1990 | 62°F | 35°F | 0" | 0" |
| 1989 | 35°F | 25°F | 0.03" | 0" |
| 1988 | 40°F | 18°F | 0" | -- |
| 1987 | 63°F | 24°F | 0" | 0" |
| 1986 | 39°F | 14°F | 0" | 0" |
| 1985 | 55°F | 26°F | 0" | 0" |
| 1984 | 37°F | 31°F | 0.46" | 1" |
| 1983 | 32°F | 23°F | 1.32" | 5" |
| 1982 | 41°F | 32°F | 0" | 0" |
| 1981 | 48°F | 12°F | 0" | 0" |
| 1980 | 54°F | 30°F | 0" | -- |
| 1979 | 46°F | 29°F | 0" | 0" |
| 1978 | 49°F | 37°F | 0.25" | 0" |
| 1977 | 42°F | 30°F | 0" | 0" |
| 1976 | 65°F | 31°F | 0" | 0" |
| 1975 | 70°F | 37°F | 0.08" | 0" |
| 1974 | 39°F | 21°F | 0.33" | 1" |
| 1973 | 40°F | 24°F | 0" | 0" |
| 1972 | 68°F | 51°F | 0" | 0" |
| 1971 | 52°F | 27°F | 0" | 0" |