Weather on April 18 at Indiana Dunes
Indiana Dunes National Park
Based on 56 years of data from Gary, IN
Planning Your Visit
April 18th in Indiana Dunes National Park (via Gary, IN) typically brings mild spring weather, with average highs around 63°F and lows near 41°F. Over 56 years of records, the warmest April 18th was in 1985 (75°F average), while the coldest was 1983 (28°F) — a 47°F range across recorded history. Precipitation has occurred on 32% of recorded April 18th dates, with snow falling 2% of the time. 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 April 18th 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 | 84°F | 48°F | -- | 0" |
| 2025 | 69°F | 51°F | 0.05" | 0" |
| 2024 | 71°F | 43°F | 0.08" | 0" |
| 2023 | 40°F | 31°F | 0" | 0" |
| 2022 | 40°F | 31°F | 0.2" | 0.2" |
| 2021 | 64°F | 30°F | -- | -- |
| 2020 | 58°F | 31°F | -- | -- |
| 2019 | 75°F | 55°F | 0.38" | 0" |
| 2018 | 38°F | 25°F | 0" | 0" |
| 2017 | 68°F | 39°F | 0" | 0" |
| 2016 | 79°F | 53°F | 0" | 0" |
| 2015 | 77°F | 56°F | 0" | 0" |
| 2014 | 63°F | 39°F | 0" | 0" |
| 2013 | 60°F | 45°F | 3.07" | 0" |
| 2012 | 50°F | 39°F | 0" | 0" |
| 2011 | 51°F | 32°F | 1.07" | 0" |
| 2010 | 52°F | 38°F | 0" | 0" |
| 2009 | 66°F | 42°F | 0" | 0" |
| 2008 | 76°F | 55°F | 0" | 0" |
| 2007 | 70°F | 38°F | 0" | 0" |
| 2006 | 50°F | 40°F | 0" | 0" |
| 2005 | 78°F | 43°F | 0" | 0" |
| 2004 | 75°F | 51°F | 0" | 0" |
| 2003 | 59°F | 38°F | 0.03" | 0" |
| 2002 | 82°F | 66°F | 0" | 0" |
| 2001 | 38°F | 26°F | 0" | 0" |
| 2000 | 45°F | 39°F | 0" | 0" |
| 1999 | 47°F | 32°F | 0.94" | 0" |
| 1998 | 54°F | 34°F | 0" | 0" |
| 1997 | 55°F | 37°F | -- | -- |
| 1996 | 76°F | 52°F | 2.03" | 0" |
| 1995 | 57°F | 42°F | 1.3" | 0" |
| 1994 | 66°F | 47°F | 0" | 0" |
| 1993 | 63°F | 42°F | 0" | 0" |
| 1992 | 67°F | 40°F | 0.28" | 0" |
| 1991 | 60°F | 35°F | 0" | 0" |
| 1990 | 55°F | 27°F | 0" | 0" |
| 1989 | 45°F | 35°F | 0.58" | 0" |
| 1988 | 74°F | 24°F | 0.13" | 0" |
| 1987 | 77°F | 40°F | 0" | 0" |
| 1986 | 71°F | 32°F | 0" | 0" |
| 1985 | 85°F | 65°F | 0" | 0" |
| 1984 | 46°F | 30°F | 0.23" | 0" |
| 1983 | 35°F | 21°F | 0" | 0" |
| 1982 | 65°F | 35°F | -- | -- |
| 1981 | 80°F | 45°F | 0" | 0" |
| 1980 | 67°F | 29°F | 0" | 0" |
| 1979 | 57°F | 30°F | 0" | 0" |
| 1978 | 62°F | 41°F | 1.65" | 0" |
| 1977 | 87°F | 58°F | 0.76" | 0" |
| 1976 | 82°F | 59°F | 0" | 0" |
| 1975 | 72°F | 61°F | 2.18" | 0" |
| 1974 | 65°F | 43°F | 0" | 0" |
| 1973 | 67°F | 49°F | 0.08" | 0" |
| 1972 | 74°F | 50°F | 0" | 0" |
| 1971 | 66°F | 35°F | 0" | 0" |