Weather on March 31 at Indiana Dunes
Indiana Dunes National Park
Based on 56 years of data from Gary, IN
Planning Your Visit
March 31st in Indiana Dunes National Park (via Gary, IN) typically brings cool spring weather, with average highs around 56°F and lows near 34°F. Over 56 years of records, the warmest March 31st was in 2026 (72°F average), while the coldest was 1987 (27°F) — a 45°F range across recorded history. Rain or other precipitation has occurred on about 39% of March 31st dates historically, with the wettest March 31st recording 4.32" of rain. The last decade has been 1.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.8°F warmer on this date compared to 20-30 years ago.
Planning for March 31st in Indiana Dunes? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2026 | 84°F | 61°F | 0" | 0" |
| 2025 | 80°F | 36°F | 1.09" | 0" |
| 2024 | 60°F | 35°F | -- | 0" |
| 2023 | 54°F | 24°F | 0.05" | 0" |
| 2022 | 61°F | 36°F | 4.32" | 0" |
| 2021 | 70°F | 36°F | 0" | 0" |
| 2020 | 46°F | 35°F | 0" | 0" |
| 2019 | 35°F | 26°F | -- | -- |
| 2018 | 45°F | 33°F | -- | 0" |
| 2017 | 49°F | 36°F | 1.4" | 0" |
| 2016 | 60°F | 44°F | 1.24" | 0" |
| 2015 | 61°F | 36°F | 0.03" | 0" |
| 2014 | 56°F | 26°F | 0" | 0" |
| 2013 | 57°F | 28°F | 0" | 0" |
| 2012 | 52°F | 37°F | 0.1" | 0" |
| 2011 | 43°F | 23°F | 0" | 0" |
| 2010 | 61°F | 35°F | 0" | 0" |
| 2009 | 47°F | 35°F | 0" | 0" |
| 2008 | 55°F | 36°F | 0.2" | 0" |
| 2007 | 62°F | 40°F | 0" | 0" |
| 2006 | 71°F | 49°F | 0.18" | 0" |
| 2005 | 76°F | 46°F | 0.05" | 0" |
| 2004 | 56°F | 37°F | 1.52" | 0" |
| 2003 | 41°F | 26°F | 0" | 0" |
| 2002 | 54°F | 29°F | 0.03" | 0" |
| 2001 | 48°F | 36°F | 0" | 0" |
| 2000 | 45°F | 24°F | 0" | 0" |
| 1999 | 70°F | 53°F | 0" | 0" |
| 1998 | 77°F | 43°F | 0" | 0" |
| 1997 | 42°F | 22°F | 0" | 0" |
| 1996 | 56°F | 36°F | 0" | 0" |
| 1995 | 43°F | 25°F | 0" | 0" |
| 1994 | 44°F | 24°F | 0" | 0" |
| 1993 | 63°F | 41°F | 2.64" | 0" |
| 1992 | 54°F | 29°F | 0.33" | 0" |
| 1991 | 54°F | 30°F | 0.1" | 0" |
| 1990 | 44°F | 38°F | 0.61" | 0" |
| 1989 | 40°F | 33°F | 0.05" | 0" |
| 1988 | 53°F | 24°F | 0.05" | -- |
| 1987 | 38°F | 16°F | 0" | 0" |
| 1986 | 82°F | 45°F | 0" | 0" |
| 1985 | 50°F | 30°F | 0.71" | -- |
| 1984 | 46°F | 25°F | 0" | 0" |
| 1983 | 48°F | 32°F | 0" | 0" |
| 1982 | 63°F | 39°F | 0" | 0" |
| 1981 | 84°F | 36°F | 0" | 0" |
| 1980 | 45°F | 30°F | 0.51" | -- |
| 1979 | 64°F | 35°F | 0.2" | 0" |
| 1978 | 76°F | 44°F | 0" | 0" |
| 1977 | 62°F | 38°F | 0" | 0" |
| 1976 | 50°F | 34°F | 0" | 0" |
| 1975 | 57°F | 23°F | 0" | 0" |
| 1974 | 51°F | 32°F | 0" | 0" |
| 1973 | 49°F | 36°F | 1.65" | 0" |
| 1972 | 43°F | 29°F | 0" | 0" |
| 1971 | 71°F | 39°F | 0" | 0" |