Weather on August 18
Honolulu, HI
55 Years of Data
Avg High
86°F
Avg Low
72°F
Warmest
1971
83°F avg
Coldest
2021
73°F avg
About This Date
August 18th in Honolulu, HI typically brings warm summer weather, with average highs around 86°F and lows near 72°F. Over 53 years of records, the warmest August 18th was in 1971 (83°F average), while the coldest was 2021 (73°F) — a 10°F range across recorded history. Rain or other precipitation has occurred on about 6% of August 18th dates historically. The last decade has been 4.4°F cooler on this date compared to 20-30 years ago.
The last decade has been 4.4°F cooler on this date compared to 20-30 years ago.
Planning for August 18th in Honolulu, HI? Stay hydrated and seek shade during peak afternoon hours.
Cooling Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 87° | 76° | 81° | — | — |
| 2024 | 82° | 68° | 75° | — | — |
| 2023 | 80° | 67° | 73° | — | — |
| 2022 | 81° | 68° | 74° | — | — |
| 2021coldest | 81° | 66° | 73° | — | — |
| 2020 | 81° | 67° | 74° | — | — |
| 2019 | 83° | 70° | 76° | — | — |
| 2018 | 83° | 69° | 76° | — | — |
| 2017 | 86° | 69° | 78° | — | — |
| 2016 | 83° | 68° | 75° | — | — |
| 2015 | 90° | 77° | 83° | — | — |
| 2014 | 85° | 71° | 78° | — | — |
| 2013 | 86° | 66° | 76° | — | — |
| 2012 | 89° | 65° | 77° | — | — |
| 2011 | 89° | 71° | 80° | — | — |
| 2010 | 86° | 70° | 78° | — | — |
| 2009 | 88° | 74° | 81° | — | — |
| 2008 | 87° | 70° | 78° | — | — |
| 2007 | 87° | 74° | 80° | — | — |
| 2006 | 88° | 66° | 77° | — | — |
| 2005 | 87° | 71° | 79° | — | — |
| 2004 | 89° | 76° | 82° | — | — |
| 2003 | 89° | 74° | 81° | — | — |
| 2002 | 88° | 73° | 80° | — | — |
| 2001 | 87° | 77° | 82° | — | — |
| 2000 | 84° | 70° | 77° | — | — |
| 1999 | 90° | 71° | 80° | — | — |
| 1998 | 85° | 71° | 78° | — | — |
| 1997 | 86° | 73° | 80° | — | — |
| 1996 | 88° | 72° | 80° | — | — |
| 1995 | 86° | 72° | 79° | — | — |
| 1994 | 88° | 73° | 80° | — | — |
| 1993 | 89° | 77° | 83° | — | — |
| 1992 | 90° | 74° | 82° | — | — |
| 1991 | 87° | 71° | 79° | — | — |
| 1990 | 85° | 70° | 77° | — | — |
| 1989 | 86° | 69° | 78° | — | — |
| 1988 | 87° | 71° | 79° | — | — |
| 1987 | 86° | 74° | 80° | — | — |
| 1986 | 87° | 73° | 80° | — | — |
| 1985 | 84° | 72° | 78° | — | — |
| 1984 | 84° | 74° | 79° | — | — |
| 1983 | 86° | 69° | 78° | — | — |
| 1982 | 83° | 71° | 77° | — | — |
| 1981 | 92° | 68° | 80° | — | — |
| 1978 | 84° | 72° | 78° | 0.03" | — |
| 1977 | 85° | 76° | 80° | — | — |
| 1976 | 85° | 75° | 80° | 0.23" | — |
| 1975 | 85° | 75° | 80° | 0.43" | — |
| 1974 | 86° | 79° | 82° | — | — |
| 1973 | 85° | 73° | 79° | — | — |
| 1972 | 87° | 72° | 79° | — | — |
| 1971warmest | 92° | 75° | 83° | — | — |
53 years of data from FRENCH FRIGATE SHOALS