Weather on October 21
Honolulu, HI
55 Years of Data
Avg High
85°F
Avg Low
70°F
Warmest
2009
84°F avg
Coldest
2021
71°F avg
About This Date
October 21st in Honolulu, HI typically brings warm fall weather, with average highs around 85°F and lows near 70°F. Over 51 years of records, the warmest October 21st was in 2009 (84°F average), while the coldest was 2021 (71°F) — a 13°F range across recorded history. Rain or other precipitation has occurred on about 20% of October 21st dates historically, with the wettest October 21st recording 0.79" of rain. The last decade has been 4.0°F cooler on this date compared to 20-30 years ago.
The last decade has been 4.0°F cooler on this date compared to 20-30 years ago.
Planning for October 21st in Honolulu, HI? Stay hydrated and seek shade during peak afternoon hours.
Cooling Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 87° | 72° | 79° | — | — |
| 2024 | 81° | 66° | 73° | — | — |
| 2023 | 80° | 68° | 74° | — | — |
| 2022 | 83° | 68° | 75° | — | — |
| 2021coldest | 78° | 65° | 71° | — | — |
| 2020 | 79° | 69° | 74° | — | — |
| 2019 | 83° | 69° | 76° | — | — |
| 2018 | 82° | 65° | 73° | — | — |
| 2017 | 79° | 67° | 73° | — | — |
| 2016 | 84° | 66° | 75° | — | — |
| 2014 | 89° | 72° | 80° | — | — |
| 2013 | 84° | 68° | 76° | 0.03" | — |
| 2012 | 86° | 65° | 75° | — | — |
| 2011 | 84° | 69° | 77° | 0.08" | — |
| 2010 | 89° | 72° | 80° | — | — |
| 2009warmest | 90° | 78° | 84° | — | — |
| 2008 | 86° | 73° | 80° | — | — |
| 2007 | 85° | 70° | 77° | — | — |
| 2005 | 84° | 70° | 77° | — | — |
| 2004 | 88° | 72° | 80° | — | — |
| 2003 | 88° | 73° | 80° | — | — |
| 2002 | 87° | 72° | 79° | — | — |
| 2001 | 87° | 68° | 78° | — | — |
| 1999 | 84° | 72° | 78° | 0.46" | — |
| 1998 | 83° | 69° | 76° | — | — |
| 1997 | 85° | 70° | 77° | 0.1" | — |
| 1996 | 86° | 73° | 80° | 0.08" | — |
| 1995 | 88° | 72° | 80° | — | — |
| 1994 | 88° | 71° | 79° | 0.08" | — |
| 1993 | 86° | 67° | 76° | — | — |
| 1992 | 86° | 72° | 79° | — | — |
| 1991 | 86° | 68° | 77° | — | — |
| 1990 | 81° | 70° | 75° | 0.25" | — |
| 1989 | 87° | 70° | 78° | — | — |
| 1988 | 88° | 69° | 78° | — | — |
| 1987 | 84° | 72° | 78° | — | — |
| 1986 | 87° | 66° | 77° | — | — |
| 1985 | 88° | 71° | 79° | — | — |
| 1984 | 88° | 70° | 79° | — | — |
| 1983 | 85° | 70° | 77° | — | — |
| 1982 | 83° | 68° | 75° | — | — |
| 1981 | 87° | 60° | 74° | — | — |
| 1980 | 85° | 65° | 75° | — | — |
| 1978 | 85° | 70° | 77° | — | — |
| 1977 | 84° | 75° | 80° | — | — |
| 1976 | 76° | 71° | 73° | 0.13" | — |
| 1975 | 85° | 72° | 78° | — | — |
| 1974 | 84° | — | — | — | — |
| 1973 | 83° | 74° | 78° | 0.03" | — |
| 1972 | 84° | 72° | 78° | 0.79" | — |
| 1971 | 86° | 72° | 79° | — | — |
51 years of data from FRENCH FRIGATE SHOALS