Weather on April 21
Honolulu, HI
55 Years of Data
Avg High
81°F
Avg Low
66°F
Warmest
1986
78°F avg
Coldest
1977
68°F avg
About This Date
April 21st in Honolulu, HI typically brings warm spring weather, with average highs around 81°F and lows near 66°F. Over 52 years of records, the warmest April 21st was in 1986 (78°F average), while the coldest was 1977 (68°F) — a 10°F range across recorded history. Rain or other precipitation has occurred on about 29% of April 21st dates historically, with the wettest April 21st recording 1.14" of rain. The last decade has been 3.2°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.2°F cooler on this date compared to 20-30 years ago.
Planning for April 21st in Honolulu, HI? Stay hydrated and seek shade during peak afternoon hours.
Cooling Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 82° | 68° | 75° | — | — |
| 2024 | 76° | 61° | 68° | — | — |
| 2023 | 78° | 64° | 71° | — | — |
| 2022 | 77° | 63° | 70° | — | — |
| 2021 | 79° | 66° | 72° | — | — |
| 2020 | 79° | 66° | 72° | — | — |
| 2019 | 78° | 65° | 71° | — | — |
| 2018 | 77° | 64° | 71° | — | — |
| 2017 | 77° | 64° | 71° | — | — |
| 2016 | 78° | 62° | 70° | — | — |
| 2015 | 86° | 66° | 76° | 0.23" | — |
| 2014 | 83° | 70° | 76° | — | — |
| 2013 | 79° | 70° | 74° | 0.36" | — |
| 2012 | 82° | 64° | 73° | — | — |
| 2011 | 85° | 68° | 76° | — | — |
| 2010 | 78° | 61° | 69° | — | — |
| 2009 | 80° | 68° | 74° | — | — |
| 2008 | 83° | 67° | 75° | 0.58" | — |
| 2007 | 83° | 65° | 74° | — | — |
| 2006 | 79° | 59° | 69° | — | — |
| 2005 | 82° | 64° | 73° | — | — |
| 2004 | 82° | 68° | 75° | — | — |
| 2003 | 79° | 65° | 72° | 0.15" | — |
| 2002 | 85° | 69° | 77° | 0.15" | — |
| 2001 | 81° | 66° | 73° | 0.03" | — |
| 1999 | 85° | 67° | 76° | — | — |
| 1998 | 79° | 68° | 73° | 0.03" | — |
| 1997 | 82° | 69° | 76° | — | — |
| 1996 | 85° | 64° | 74° | — | — |
| 1995 | 85° | 65° | 75° | — | — |
| 1994 | 83° | 65° | 74° | — | — |
| 1993 | 84° | 64° | 74° | — | — |
| 1992 | 85° | 68° | 76° | — | — |
| 1991 | 82° | 65° | 73° | 0.3" | — |
| 1990 | 82° | 64° | 73° | — | — |
| 1989 | 79° | 64° | 71° | 0.03" | — |
| 1988 | 85° | 64° | 74° | — | — |
| 1987 | 80° | 62° | 71° | 1.14" | — |
| 1986warmest | 87° | 70° | 78° | — | — |
| 1985 | 83° | 65° | 74° | — | — |
| 1984 | 84° | 69° | 77° | — | — |
| 1983 | 77° | 61° | 69° | — | — |
| 1982 | 78° | 66° | 72° | — | — |
| 1981 | 87° | 62° | 75° | — | — |
| 1978 | 80° | 65° | 72° | 0.25" | — |
| 1977coldest | 79° | 58° | 68° | 0.05" | — |
| 1976 | 78° | 70° | 74° | 0.03" | — |
| 1975 | 79° | 66° | 72° | — | — |
| 1974 | 82° | 72° | 77° | — | — |
| 1973 | 85° | 69° | 77° | 0.3" | — |
| 1972 | 81° | 64° | 72° | — | — |
| 1971 | 78° | 70° | 74° | 0.15" | — |
52 years of data from FRENCH FRIGATE SHOALS