July is one of the warmer months of the year in Honolulu, with average highs near 27.3°C and lows around 24.4°C (mean 25.9°C). It is one of the drier months, averaging 40 mm of rainfall and 75% relative humidity across the period.
July is one of the warmer months of the year in Honolulu. Across 45 years of records, the warmest Julys in Honolulu were 2015 and 2019 — when the month averaged 27.1°C — while the coldest were 1983 and 1998 at 24.7°C. Typical July days reach 27.3°C with nights near 24.4°C. The long-term trend is warming, about 0.3°C per decade.
July is one of the drier months in Honolulu, averaging 40 mm of rainfall. The wettest July on record was 1983 with 136 mm, while the driest was 2007 at 4 mm.
Relative humidity in Honolulu during July averages 75%. The most humid July was 1982 at 80%, and the least humid was 1988 at 71%.
July receives about 6.8 kWh/m²/day of solar energy in Honolulu. The sunniest Julys were 2004 and 2019 at 7.3 kWh/m²/day, and the cloudiest were 1986 and 1993 at 6.1.
Average wind speed in Honolulu during July is 6.4 m/s. The windiest July was 1989 at 7.1 m/s, while the calmest was 2015 at 5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 25.3°C | 25.5°C | 25.9°C | 26.2°C | 26.3°C | +1°C |
| Avg High | 26.7°C | 27.0°C | 27.4°C | 27.7°C | 27.9°C | +1.2°C |
| Avg Low | 23.9°C | 24.1°C | 24.4°C | 24.7°C | 24.8°C | +0.9°C |
| Avg Rain | 71 mm | 16 mm | 31 mm | 43 mm | 42 mm | -29 mm |
July temperatures in Honolulu have risen by about 1.2°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 22.3°C (1999) to a record high of 30.2°C (2015).
Rainfall in July is one of the drier months, averaging 40 mm, with a wettest year of 136 mm.
A quieter season to visit Honolulu
If your dates are flexible, the more temperate months of February and March tend to be the most comfortable for visiting Honolulu. That said, July — with days averaging 27.3°C and nights around 24.4°C (mean 25.9°C) and moderate rainfall (40 mm) — can still be rewarding for travellers who don't mind the warmth, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 28.3°C | 26.7°C | 25.1°C | 29.3°C | 24.4°C | 14 mm | 73% | 6.4 m/s | 7.1 |
| 2024 | 28.0°C | 26.4°C | 24.8°C | 28.7°C | 24.1°C | 9 mm | 73% | 6.6 m/s | 6.8 |
| 2023 | 28.1°C | 26.5°C | 25.0°C | 28.8°C | 23.9°C | 14 mm | 73% | 6.7 m/s | 6.9 |
| 2022 | 27.4°C | 25.9°C | 24.4°C | 28.6°C | 23.8°C | 61 mm | 76% | 7 m/s | 6.9 |
| 2021 | 27.4°C | 26.0°C | 24.7°C | 28.1°C | 24.1°C | 64 mm | 76% | 7 m/s | 6.8 |
| 2020 | 27.9°C | 26.5°C | 25.0°C | 28.9°C | 24.2°C | 87 mm | 75% | 6.1 m/s | 6.8 |
| 2019 | 28.5°C | 27.1°C | 25.7°C | 29.4°C | 25.0°C | 31 mm | 75% | 6.1 m/s | 7.3 |
| 2018 | 27.4°C | 26.1°C | 24.7°C | 28.6°C | 24.0°C | 45 mm | 79% | 6.4 m/s | 6.4 |
| 2017 | 28.1°C | 26.6°C | 25.2°C | 29.0°C | 24.5°C | 32 mm | 75% | 5.9 m/s | 7.1 |
| 2016 | 27.6°C | 26.2°C | 24.9°C | 28.7°C | 24.3°C | 127 mm | 77% | 6.1 m/s | 6.8 |
| 2015 🔥 | 28.7°C | 27.1°C | 25.5°C | 30.2°C | 24.3°C | 45 mm | 75% | 5 m/s | 7.2 |
| 2014 | 27.9°C | 26.4°C | 25.0°C | 28.8°C | 24.2°C | 71 mm | 75% | 6.1 m/s | 6.9 |
| 2013 | 27.8°C | 26.1°C | 24.5°C | 29.0°C | 23.3°C | 27 mm | 73% | 5.6 m/s | 7 |
| 2012 | 26.6°C | 25.1°C | 23.6°C | 27.8°C | 22.8°C | 21 mm | 74% | 6.8 m/s | 6.9 |
| 2011 | 26.9°C | 25.3°C | 23.8°C | 27.7°C | 23.3°C | 7 mm | 74% | 6.6 m/s | 7.1 |
| 2010 | 27.0°C | 25.5°C | 23.9°C | 27.8°C | 23.3°C | 27 mm | 72% | 6 m/s | 6.9 |
| 2009 | 27.4°C | 25.9°C | 24.5°C | 28.5°C | 23.3°C | 40 mm | 75% | 6.2 m/s | 6.9 |
| 2008 | 27.8°C | 26.2°C | 24.6°C | 28.6°C | 24.0°C | 24 mm | 73% | 5.9 m/s | 7.1 |
| 2007 | 27.6°C | 26.1°C | 24.5°C | 28.2°C | 23.8°C | 4 mm | 74% | 6.7 m/s | 7 |
| 2006 | 27.5°C | 26.0°C | 24.5°C | 28.6°C | 23.8°C | 27 mm | 72% | 6.6 m/s | 7.1 |
| 2005 | 27.3°C | 25.9°C | 24.5°C | 28.0°C | 23.8°C | 56 mm | 74% | 7 m/s | 7 |
| 2004 | 28.0°C | 26.4°C | 24.8°C | 29.1°C | 24.2°C | 31 mm | 73% | 6 m/s | 7.3 |
| 2003 | 27.4°C | 26.0°C | 24.5°C | 28.6°C | 23.7°C | 47 mm | 74% | 6.5 m/s | 6.9 |
| 2002 | 27.1°C | 25.6°C | 24.0°C | 29.3°C | 23.4°C | 41 mm | 76% | 6.6 m/s | 6.8 |
| 2001 | 27.3°C | 25.8°C | 24.2°C | 28.4°C | 23.5°C | 12 mm | 73% | 6.2 m/s | 7.1 |
| 2000 | 26.7°C | 25.3°C | 24.0°C | 27.6°C | 23.3°C | 31 mm | 76% | 6.7 m/s | 6.7 |
| 1999 | 26.4°C | 24.9°C | 23.5°C | 27.2°C | 22.3°C | 11 mm | 73% | 6.9 m/s | 6.8 |
| 1998 | 26.2°C | 24.7°C | 23.3°C | 27.2°C | 22.7°C | 13 mm | 72% | 7 m/s | 6.8 |
| 1997 | 27.6°C | 26.1°C | 24.6°C | 29.9°C | 23.7°C | 16 mm | 72% | 6.7 m/s | 7 |
| 1996 | 27.4°C | 26.1°C | 24.8°C | 28.4°C | 24.1°C | 7 mm | 74% | 6.7 m/s | 6.8 |
| 1995 | 27.2°C | 25.8°C | 24.3°C | 28.5°C | 23.8°C | 6 mm | 74% | 6.7 m/s | 6.7 |
| 1994 | 27.1°C | 25.8°C | 24.5°C | 27.9°C | 23.8°C | 16 mm | 77% | 7 m/s | 6.2 |
| 1993 | 26.9°C | 25.5°C | 24.1°C | 28.3°C | 23.0°C | 24 mm | 74% | 6.1 m/s | 6.1 |
| 1992 | 27.5°C | 26.0°C | 24.5°C | 28.8°C | 23.9°C | 10 mm | 74% | 6.3 m/s | 6.4 |
| 1991 | 26.6°C | 25.1°C | 23.6°C | 28.1°C | 22.6°C | 33 mm | 75% | 5.9 m/s | 6.4 |
| 1990 | 26.8°C | 25.3°C | 23.8°C | 27.8°C | 23.0°C | 25 mm | 75% | 6.1 m/s | 6.5 |
| 1989 | 26.4°C | 25.2°C | 23.9°C | 27.0°C | 23.2°C | 76 mm | 77% | 7.1 m/s | 6.3 |
| 1988 | 27.2°C | 25.8°C | 24.3°C | 28.0°C | 23.3°C | 17 mm | 71% | 6.6 m/s | 6.7 |
| 1987 | 27.1°C | 25.6°C | 24.1°C | 28.2°C | 23.4°C | 54 mm | 76% | 6 m/s | 6.5 |
| 1986 | 26.9°C | 25.7°C | 24.4°C | 27.8°C | 23.4°C | 40 mm | 78% | 6.4 m/s | 6.1 |
| 1985 | 26.3°C | 24.9°C | 23.5°C | 27.6°C | 22.8°C | 114 mm | 78% | 5.8 m/s | 6.5 |
| 1984 | 26.8°C | 25.3°C | 23.8°C | 27.7°C | 23.1°C | 51 mm | 75% | 5.5 m/s | 6.7 |
| 1983 ❄️ 🌧️ | 26.1°C | 24.7°C | 23.4°C | 26.4°C | 22.7°C | 136 mm | 78% | 6.9 m/s | — |
| 1982 | 26.5°C | 25.3°C | 24.0°C | 27.6°C | 23.1°C | 114 mm | 80% | 6.1 m/s | — |
| 1981 | 26.9°C | 25.4°C | 23.9°C | 27.7°C | 22.4°C | 33 mm | 75% | 5.9 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 27.3°C with lows near 24.4°C (mean 25.9°C), based on 45 years of NASA POWER data.
July averages 40 mm of rainfall in Honolulu, one of the drier months. The wettest on record was 136 mm in 1983.
The hottest July reached 30.2°C in 2015. The coldest dipped to 22.3°C in 1999.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 1.2°C. Daytime highs moved from 26.5°C to 27.8°C and overnight lows from 23.7°C to 24.8°C over the same span.
July is one of the warmer months of the year in Honolulu and one of the drier months, so plan for around 27.3°C daytime highs and 24.4°C at night.
Not quite — July is the 9th coolest month in Honolulu, averaging 25.9°C.
For July in Honolulu, pack light layers you can adjust through the day, with typical highs of 27.3°C and lows of 24.4°C.
Relative humidity in July averages 75% — moderately humid.
Average wind speed in July is 6.4 m/s. The windiest July on record averaged 7.1 m/s (1989).
The wettest July on record was 1983 with 136 mm. On average, July sees 40 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Honolulu behaves each July, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for July specifically, along with year-by-year records and how the month has changed over the decades.
