Weather on April 20 at Indiana Dunes
Indiana Dunes National Park
Based on 56 years of data from Gary, IN
Planning Your Visit
April 20th in Indiana Dunes National Park (via Gary, IN) typically brings mild spring weather, with average highs around 62°F and lows near 42°F. Over 56 years of records, the warmest April 20th was in 2005 (72°F average), while the coldest was 2013 (36°F) — a 36°F range across recorded history. Rain or other precipitation has occurred on about 48% of April 20th dates historically, with the wettest April 20th recording 4.22" of rain. The last decade has been 9.6°F cooler on this date compared to 20-30 years ago.
The last decade has been 9.6°F cooler on this date compared to 20-30 years ago.
Planning for April 20th 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 | 56°F | 33°F | -- | -- |
| 2025 | 59°F | 44°F | 0" | 0" |
| 2024 | 57°F | 40°F | 0" | 0" |
| 2023 | 76°F | 46°F | 0.66" | 0" |
| 2022 | 43°F | 36°F | 0" | 0" |
| 2021 | 54°F | 36°F | 0.64" | 0" |
| 2020 | 65°F | 29°F | -- | -- |
| 2019 | 50°F | 34°F | -- | -- |
| 2018 | 43°F | 29°F | 0" | 0" |
| 2017 | 70°F | 43°F | 0.81" | 0" |
| 2016 | 69°F | 44°F | 0" | 0" |
| 2015 | 72°F | 48°F | 1.55" | 0" |
| 2014 | 68°F | 44°F | 0" | 0" |
| 2013 | 39°F | 33°F | 0" | 0" |
| 2012 | 61°F | 44°F | 0.28" | 0" |
| 2011 | 42°F | 37°F | 2.51" | -- |
| 2010 | 47°F | 35°F | 0" | 0" |
| 2009 | 60°F | 39°F | 0.89" | 0" |
| 2008 | 62°F | 42°F | 0.15" | 0" |
| 2007 | 50°F | 35°F | 0" | 0" |
| 2006 | 76°F | 52°F | 0.1" | 0" |
| 2005 | 80°F | 65°F | 0" | 0" |
| 2004 | 74°F | 46°F | 0" | 0" |
| 2003 | 80°F | 57°F | 1.04" | 0" |
| 2002 | 66°F | 41°F | 3.05" | 0" |
| 2001 | 68°F | 46°F | 0.36" | 0" |
| 2000 | 60°F | 51°F | 1.24" | 0" |
| 1999 | 53°F | 32°F | 0" | 0" |
| 1998 | 66°F | 47°F | 4.22" | 0" |
| 1997 | 59°F | 39°F | -- | -- |
| 1996 | 76°F | 42°F | 0.03" | 0" |
| 1995 | 48°F | 39°F | 0.94" | 0" |
| 1994 | 68°F | 33°F | 0" | 0" |
| 1993 | 62°F | 36°F | 3.51" | 0" |
| 1992 | 74°F | 60°F | 0.3" | 0" |
| 1991 | 44°F | 38°F | 0" | 0" |
| 1990 | 61°F | 49°F | 0.36" | 0" |
| 1989 | 68°F | 35°F | 0" | 0" |
| 1988 | 55°F | 36°F | 0.3" | 0" |
| 1987 | 87°F | 52°F | 0" | 0" |
| 1986 | 70°F | 45°F | 0.33" | 0" |
| 1985 | 85°F | 58°F | 0" | 0" |
| 1984 | 52°F | 33°F | 0" | 0" |
| 1983 | 52°F | 25°F | 0" | 0" |
| 1982 | 62°F | 37°F | 0.1" | -- |
| 1981 | 50°F | 31°F | 0" | 0" |
| 1980 | -- | 34°F | 0" | 0" |
| 1979 | 66°F | 44°F | 0.03" | 0" |
| 1978 | 47°F | 37°F | 0" | 0" |
| 1977 | 78°F | 62°F | 1.45" | 0" |
| 1976 | 72°F | 49°F | 1.24" | 0" |
| 1975 | 50°F | 38°F | 0" | 0" |
| 1974 | 78°F | 42°F | 0" | 0" |
| 1973 | 76°F | 61°F | 0.48" | 0" |
| 1972 | 49°F | 38°F | 0.61" | 0" |
| 1971 | 77°F | 47°F | 0" | 0" |