Weather on April 21 at Hawaii Volcanoes
Hawaii Volcanoes National Park
Based on 56 years of data from Hilo, HI
Elevation Note: Hawaii Volcanoes sits at 4,000 ft. Expect temperatures 14°F cooler than the data shown below, which comes from Hilo, HI at a lower elevation.
Planning Your Visit
April 21st in Hawaii Volcanoes National Park (via Hilo, HI) typically brings warm spring weather, with average highs around 80°F and lows near 66°F. Over 56 years of records, the warmest April 21st was in 2021 (79°F average), while the coldest was 2024 (68°F) — a 11°F range across recorded history. Rain or other precipitation has occurred on about 88% of April 21st dates historically, with the wettest April 21st recording 4.14" of rain. The last decade has been 1.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.6°F warmer on this date compared to 20-30 years ago.
Planning for April 21st in Hawaii Volcanoes? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2026 | 84°F | 67°F | 0.05" | -- |
| 2025 | 84°F | 66°F | 0.03" | -- |
| 2024 | 73°F | 64°F | 1.52" | -- |
| 2023 | 84°F | 68°F | 0.15" | -- |
| 2022 | 80°F | 65°F | 0.79" | -- |
| 2021 | 86°F | 71°F | 0.18" | -- |
| 2020 | 85°F | 67°F | 0.03" | -- |
| 2019 | 82°F | 66°F | 0" | -- |
| 2018 | 80°F | 68°F | 0.69" | -- |
| 2017 | 83°F | 65°F | 0" | -- |
| 2016 | 82°F | 68°F | 0.15" | -- |
| 2015 | 83°F | 65°F | 0.94" | -- |
| 2014 | 81°F | 69°F | 1.04" | -- |
| 2013 | 79°F | 67°F | 0.1" | -- |
| 2012 | 79°F | 66°F | 0.79" | -- |
| 2011 | 83°F | 64°F | 0.08" | -- |
| 2010 | 83°F | 62°F | 1.4" | -- |
| 2009 | 73°F | 65°F | 3.02" | -- |
| 2008 | 81°F | 63°F | 0" | -- |
| 2007 | 77°F | 66°F | 3" | -- |
| 2006 | 78°F | 66°F | 0.64" | -- |
| 2005 | 80°F | 64°F | 0" | -- |
| 2004 | 81°F | 66°F | 0.3" | -- |
| 2003 | 77°F | 66°F | 0.99" | -- |
| 2002 | 82°F | 67°F | 0.86" | -- |
| 2001 | 77°F | 67°F | 0.25" | -- |
| 2000 | 78°F | 63°F | 0.33" | -- |
| 1999 | 79°F | 67°F | 0.43" | -- |
| 1998 | 77°F | 67°F | 0.2" | -- |
| 1997 | 84°F | 67°F | 0" | 0" |
| 1996 | 81°F | 69°F | 0.79" | 0" |
| 1995 | 82°F | 69°F | 0.64" | 0" |
| 1994 | 82°F | 68°F | 1.19" | 0" |
| 1993 | 79°F | 68°F | 2.36" | 0" |
| 1992 | 83°F | 66°F | 0" | 0" |
| 1991 | 80°F | 63°F | 0.3" | 0" |
| 1990 | 81°F | 66°F | 0.2" | 0" |
| 1989 | 76°F | 63°F | 4.14" | 0" |
| 1988 | 80°F | 65°F | 0.81" | 0" |
| 1987 | 84°F | 66°F | 0" | 0" |
| 1986 | 83°F | 67°F | 0.76" | 0" |
| 1985 | 77°F | 63°F | 0.2" | 0" |
| 1984 | 80°F | 68°F | 0.36" | 0" |
| 1983 | 78°F | 61°F | 0.08" | 0" |
| 1982 | 78°F | 66°F | 0.43" | 0" |
| 1981 | 82°F | 70°F | 0.28" | 0" |
| 1980 | 82°F | 67°F | 0.94" | 0" |
| 1979 | 82°F | 66°F | 0.05" | 0" |
| 1978 | 82°F | 67°F | 0.03" | 0" |
| 1977 | 81°F | 68°F | 1.55" | 0" |
| 1976 | 80°F | 65°F | 1.22" | 0" |
| 1975 | 78°F | 67°F | 0.81" | 0" |
| 1974 | 80°F | 68°F | 1.07" | 0" |
| 1973 | 79°F | 64°F | 1.57" | 0" |
| 1972 | 80°F | 64°F | 0.64" | 0" |
| 1971 | 78°F | 63°F | 0.97" | 0" |