October is one of the warmer months of the year in Kailua, with average highs near 26.5°C and lows around 25.1°C (mean 25.8°C). It is about average for rainfall, averaging 52 mm of rainfall and 77% relative humidity across the period.
October is one of the warmer months of the year in Kailua. Across 45 years of records, the warmest October in Kailua was 2019 — when the month averaged 27°C — while the coldest was 1983 at 24.2°C. Typical October days reach 26.5°C with nights near 25.1°C. The long-term trend is warming, about 0.3°C per decade.
October is about average for rainfall in Kailua, averaging 52 mm of rainfall. The wettest October on record was 1982 with 281 mm, while the driest was 2023 at 7 mm.
Relative humidity in Kailua during October averages 77%. The most humid October was 2018 at 81%, and the least humid was 2020 at 74%.
October receives about 5.2 kWh/m²/day of solar energy in Kailua. The sunniest October was 2023 at 5.7 kWh/m²/day, and the cloudiest was 1985 at 4.5.
Average wind speed in Kailua during October is 5.5 m/s. The windiest October was 2000 at 7 m/s, while the calmest was 2020 at 3.2 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 | 25.8°C | 26.0°C | 26.4°C | +1.1°C |
| Avg High | 26.0°C | 26.2°C | 26.5°C | 26.8°C | 27.3°C | +1.3°C |
| Avg Low | 24.7°C | 24.9°C | 25.1°C | 25.3°C | 25.6°C | +0.9°C |
| Avg Rain | 85 mm | 28 mm | 49 mm | 61 mm | 35 mm | -50 mm |
October temperatures in Kailua have risen by about 1.3°C between 1981–1985 and 2021–2025.
October has ranged from a record low of 22.3°C (1983) to a record high of 29°C (1996).
Rainfall in October is about average for rainfall, averaging 52 mm, with a wettest year of 281 mm.
A quieter season to visit Kailua
If your dates are flexible, the more temperate months of February and April tend to be the most comfortable for visiting Kailua. That said, October — with days averaging 26.5°C and nights around 25.1°C (mean 25.8°C) and moderate rainfall (52 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 | 27.5°C | 26.7°C | 25.9°C | 28.5°C | 24.8°C | 20 mm | 75% | 5.5 m/s | 5.4 |
| 2024 | 27.3°C | 26.5°C | 25.7°C | 27.9°C | 25.1°C | 24 mm | 77% | 5.9 m/s | 5.3 |
| 2023 | 27.6°C | 26.5°C | 25.5°C | 28.2°C | 24.8°C | 7 mm | 74% | 3.7 m/s | 5.7 |
| 2022 | 27.4°C | 26.5°C | 25.6°C | 28.6°C | 24.0°C | 57 mm | 75% | 4.6 m/s | 5.3 |
| 2021 | 26.2°C | 25.5°C | 24.7°C | 27.0°C | 23.9°C | 46 mm | 77% | 6.5 m/s | 5.5 |
| 2020 | 27.8°C | 26.9°C | 26.0°C | 28.5°C | 24.4°C | 54 mm | 74% | 3.2 m/s | 5.1 |
| 2019 🔥 | 27.8°C | 27.0°C | 26.2°C | 29.0°C | 25.3°C | 81 mm | 77% | 5.3 m/s | 5.4 |
| 2018 | 26.8°C | 26.1°C | 25.4°C | 28.2°C | 24.4°C | 122 mm | 81% | 4.9 m/s | 5.1 |
| 2017 | 26.8°C | 26.0°C | 25.3°C | 28.6°C | 22.7°C | 77 mm | 76% | 5 m/s | 5.1 |
| 2016 | 26.4°C | 25.8°C | 25.2°C | 27.3°C | 24.3°C | 42 mm | 77% | 6.9 m/s | 5.2 |
| 2015 | 26.8°C | 26.1°C | 25.4°C | 28.2°C | 24.1°C | 64 mm | 80% | 4.9 m/s | 5.2 |
| 2014 | 27.5°C | 26.8°C | 26.0°C | 28.8°C | 25.3°C | 121 mm | 78% | 5.3 m/s | 5.1 |
| 2013 | 26.9°C | 26.0°C | 25.2°C | 27.8°C | 24.0°C | 47 mm | 76% | 4.3 m/s | 5.3 |
| 2012 | 26.4°C | 25.6°C | 24.8°C | 27.5°C | 24.3°C | 16 mm | 77% | 4.6 m/s | 5.5 |
| 2011 | 26.2°C | 25.5°C | 24.7°C | 27.1°C | 24.0°C | 30 mm | 76% | 6.1 m/s | 5.1 |
| 2010 | 26.2°C | 25.5°C | 24.8°C | 27.3°C | 23.8°C | 10 mm | 76% | 6.1 m/s | 5.4 |
| 2009 | 27.2°C | 26.3°C | 25.5°C | 28.1°C | 24.4°C | 24 mm | 78% | 4.7 m/s | 5.4 |
| 2008 | 26.3°C | 25.6°C | 24.9°C | 27.1°C | 24.1°C | 57 mm | 76% | 5.3 m/s | 5.1 |
| 2007 | 26.3°C | 25.6°C | 24.9°C | 27.4°C | 24.4°C | 15 mm | 75% | 6.8 m/s | 5.3 |
| 2006 | 26.8°C | 26.0°C | 25.3°C | 27.9°C | 24.2°C | 75 mm | 78% | 4.4 m/s | 4.8 |
| 2005 | 26.2°C | 25.6°C | 24.9°C | 27.1°C | 24.2°C | 66 mm | 77% | 6.8 m/s | 5.2 |
| 2004 | 27.2°C | 26.5°C | 25.8°C | 28.7°C | 24.7°C | 69 mm | 77% | 5.6 m/s | 5.2 |
| 2003 | 27.3°C | 26.5°C | 25.7°C | 28.4°C | 24.4°C | 32 mm | 75% | 4.7 m/s | 5.2 |
| 2002 | 26.0°C | 25.3°C | 24.7°C | 27.1°C | 23.8°C | 75 mm | 78% | 5.8 m/s | 5.2 |
| 2001 | 25.7°C | 25.1°C | 24.5°C | 26.7°C | 23.4°C | 59 mm | 77% | 6.5 m/s | 5.2 |
| 2000 | 25.7°C | 25.1°C | 24.5°C | 27.0°C | 23.9°C | 22 mm | 78% | 7 m/s | 5.4 |
| 1999 | 25.5°C | 24.8°C | 24.2°C | 26.5°C | 23.5°C | 36 mm | 77% | 5.9 m/s | 5.1 |
| 1998 | 25.4°C | 24.8°C | 24.3°C | 25.9°C | 23.8°C | 12 mm | 78% | 6.9 m/s | 5.4 |
| 1997 | 26.8°C | 26.2°C | 25.5°C | 27.7°C | 24.6°C | 20 mm | 74% | 5.8 m/s | 5.4 |
| 1996 | 27.3°C | 26.5°C | 25.8°C | 29.0°C | 24.6°C | 18 mm | 75% | 5.6 m/s | 5.5 |
| 1995 | 26.2°C | 25.6°C | 25.1°C | 27.0°C | 23.9°C | 25 mm | 75% | 6.8 m/s | 5.4 |
| 1994 | 26.2°C | 25.5°C | 24.9°C | 27.4°C | 23.8°C | 24 mm | 77% | 6 m/s | 5.2 |
| 1993 | 26.1°C | 25.4°C | 24.7°C | 27.6°C | 22.8°C | 43 mm | 76% | 5.3 m/s | 4.9 |
| 1992 | 26.3°C | 25.7°C | 25.1°C | 27.5°C | 23.8°C | 34 mm | 77% | 5.2 m/s | 4.7 |
| 1991 | 26.3°C | 25.6°C | 24.9°C | 27.5°C | 24.0°C | 18 mm | 77% | 4.8 m/s | 4.9 |
| 1990 | 25.9°C | 25.3°C | 24.7°C | 27.1°C | 24.0°C | 51 mm | 79% | 6.3 m/s | 5.2 |
| 1989 | 26.3°C | 25.7°C | 25.0°C | 27.9°C | 23.9°C | 69 mm | 78% | 4.2 m/s | 4.8 |
| 1988 | 26.2°C | 25.5°C | 24.8°C | 27.6°C | 24.0°C | 16 mm | 78% | 4.7 m/s | 5.2 |
| 1987 | 26.4°C | 25.8°C | 25.1°C | 27.6°C | 24.2°C | 65 mm | 78% | 5.6 m/s | 4.8 |
| 1986 | 26.6°C | 25.9°C | 25.2°C | 27.7°C | 24.0°C | 20 mm | 76% | 5.5 m/s | 4.9 |
| 1985 | 25.5°C | 25.0°C | 24.4°C | 26.2°C | 23.0°C | 167 mm | 79% | 5.6 m/s | 4.5 |
| 1984 | 26.7°C | 25.9°C | 25.2°C | 27.7°C | 24.4°C | 35 mm | 77% | 4 m/s | 4.9 |
| 1983 ❄️ | 24.8°C | 24.2°C | 23.6°C | 25.6°C | 22.3°C | 76 mm | 81% | 6.6 m/s | — |
| 1982 🌧️ | 25.6°C | 25.0°C | 24.4°C | 26.7°C | 23.0°C | 281 mm | 80% | 5.3 m/s | — |
| 1981 | 25.6°C | 25.0°C | 24.4°C | 26.7°C | 23.5°C | 36 mm | 79% | 5.4 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 26.5°C with lows near 25.1°C (mean 25.8°C), based on 45 years of NASA POWER data.
October averages 52 mm of rainfall in Kailua, about average for rainfall. The wettest on record was 281 mm in 1982.
The hottest October reached 29°C in 1996. The coldest dipped to 22.3°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 1.3°C. Daytime highs moved from 25.6°C to 27.2°C and overnight lows from 24.4°C to 25.5°C over the same span.
October is one of the warmer months of the year in Kailua and about average for rainfall, so plan for around 26.5°C daytime highs and 25.1°C at night.
Not quite — October is the 10th coolest month in Kailua, averaging 25.8°C.
For October in Kailua, pack light layers you can adjust through the day, with typical highs of 26.5°C and lows of 25.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 77% — quite humid.
Average wind speed in October is 5.5 m/s. The windiest October on record averaged 7 m/s (2000).
The wettest October on record was 1982 with 281 mm. On average, October sees 52 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 Kailua behaves each October, 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 October specifically, along with year-by-year records and how the month has changed over the decades.
