Weather on May 12 at Indiana Dunes
Indiana Dunes National Park
Based on 56 years of data from Gary, IN
Planning Your Visit
May 12th in Indiana Dunes National Park (via Gary, IN) typically brings mild spring weather, with average highs around 69°F and lows near 47°F. Over 56 years of records, the warmest May 12th was in 2022 (80°F average), while the coldest was 2020 (41°F) — a 39°F range across recorded history. Rain or other precipitation has occurred on about 43% of May 12th dates historically, with the wettest May 12th recording 5.79" of rain. The last decade has been 1.9°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.9°F cooler on this date compared to 20-30 years ago.
Planning for May 12th 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 | 59°F | 35°F | 0" | 0" |
| 2025 | 74°F | 54°F | 0" | 0" |
| 2024 | 62°F | 43°F | 0" | 0" |
| 2023 | 83°F | 61°F | 0" | 0" |
| 2022 | 91°F | 70°F | 0" | 0" |
| 2021 | 49°F | 34°F | 0" | 0" |
| 2020 | 49°F | 34°F | 0" | 0" |
| 2019 | 51°F | 42°F | -- | -- |
| 2018 | 52°F | 44°F | -- | -- |
| 2017 | 55°F | 42°F | 0" | 0" |
| 2016 | 72°F | 56°F | 0" | 0" |
| 2015 | 69°F | 50°F | 0.79" | 0" |
| 2014 | 81°F | 61°F | 4.19" | 0" |
| 2013 | 58°F | 38°F | 0" | 0" |
| 2012 | 76°F | 55°F | 0" | 0" |
| 2011 | 88°F | 61°F | 1.96" | 0" |
| 2010 | 61°F | 44°F | 0.03" | 0" |
| 2009 | 58°F | 38°F | 0" | 0" |
| 2008 | 51°F | 42°F | 2.11" | 0" |
| 2007 | 74°F | 44°F | 0" | 0" |
| 2006 | 54°F | 37°F | 2.54" | 0" |
| 2005 | 62°F | 44°F | 0.46" | 0" |
| 2004 | 82°F | 63°F | 0.05" | 0" |
| 2003 | 61°F | 42°F | -- | -- |
| 2002 | 63°F | 45°F | 5.79" | 0" |
| 2001 | 70°F | 40°F | 0.69" | 0" |
| 2000 | 78°F | 61°F | 0.64" | 0" |
| 1999 | 82°F | 52°F | 0.13" | 0" |
| 1998 | 63°F | 49°F | 0" | 0" |
| 1997 | 61°F | 37°F | -- | 0" |
| 1996 | 50°F | 35°F | -- | 0" |
| 1995 | 71°F | 50°F | 0.05" | 0" |
| 1994 | 74°F | 41°F | 0.18" | 0" |
| 1993 | 82°F | 50°F | 0" | 0" |
| 1992 | 81°F | 62°F | 0" | 0" |
| 1991 | 83°F | 59°F | 0" | 0" |
| 1990 | 61°F | 46°F | 1.68" | 0" |
| 1989 | 53°F | 38°F | 0" | 0" |
| 1988 | 85°F | 52°F | 0" | 0" |
| 1987 | 87°F | 41°F | 0.71" | 0" |
| 1986 | 75°F | 54°F | 0.05" | 0" |
| 1985 | 85°F | 65°F | 0.38" | 0" |
| 1984 | 69°F | 47°F | 0" | 0" |
| 1983 | 77°F | 54°F | 0" | 0" |
| 1982 | 89°F | 54°F | 0" | 0" |
| 1981 | 57°F | 30°F | 0" | 0" |
| 1980 | 76°F | 43°F | 0.03" | 0" |
| 1979 | 64°F | 43°F | 0.2" | 0" |
| 1978 | 79°F | 59°F | 2.13" | 0" |
| 1977 | 78°F | 45°F | 0" | 0" |
| 1976 | 67°F | 33°F | 0" | 0" |
| 1975 | 68°F | 44°F | 0" | 0" |
| 1974 | 65°F | 48°F | 0.08" | 0" |
| 1973 | 67°F | 47°F | 0.18" | 0" |
| 1972 | 75°F | 44°F | 0" | 0" |
| 1971 | 68°F | 37°F | 0.48" | 0" |