October is one of the warmer months of the year in Hilo, with average highs near 24.7°C and lows around 20.9°C (mean 22.8°C). It is one of the drier months, averaging 137 mm of rainfall and 83% relative humidity across the period.
October is one of the warmer months of the year in Hilo. Across 45 years of records, the warmest October in Hilo was 1992 — when the month averaged 24°C — while the coldest was 1983 at 21.4°C. Typical October days reach 24.7°C with nights near 20.9°C. The long-term October temperature trend is broadly flat.
October is one of the drier months in Hilo, averaging 137 mm of rainfall. The wettest October on record was 1985 with 714 mm, while the driest was 1991 at 3 mm.
Relative humidity in Hilo during October averages 83%. The most humid October was 1982 at 86%, and the least humid was 1997 at 76%.
October receives about 5 kWh/m²/day of solar energy in Hilo. The sunniest October was 2023 at 5.5 kWh/m²/day, and the cloudiest was 1985 at 4.2.
Average wind speed in Hilo during October is 3.9 m/s. The windiest Octobers were 1995 and 1998 at 4.7 m/s, while the calmest was 2020 at 2.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 22.6°C | 23.0°C | 22.5°C | 22.9°C | 23.1°C | +0.5°C |
| Avg High | 24.5°C | 25.1°C | 24.2°C | 24.7°C | 25.3°C | +0.8°C |
| Avg Low | 20.7°C | 20.9°C | 20.7°C | 21.0°C | 21.0°C | +0.3°C |
| Avg Rain | 205 mm | 19 mm | 216 mm | 145 mm | 86 mm | -119 mm |
October temperatures in Hilo have risen by about 0.8°C between 1981–1985 and 2021–2025.
October has ranged from a record low of 18.3°C (2021) to a record high of 28.3°C (2020).
Rainfall in October is one of the drier months, averaging 137 mm, with a wettest year of 714 mm.
A good time to visit Hilo
October is a good time to visit Hilo, with days averaging 24.7°C and nights around 20.9°C (mean 22.8°C, warmer than Hilo's yearly average) and higher rainfall. June and May are marginally more temperate, but October still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 24.9°C | 23.0°C | 21.1°C | 26.8°C | 20.2°C | 133 mm | 84% | 3.7 m/s | 4.9 |
| 2024 | 24.7°C | 22.9°C | 21.0°C | 26.2°C | 20.1°C | 166 mm | 85% | 3.8 m/s | 5.2 |
| 2023 | 25.9°C | 23.3°C | 20.8°C | 27.7°C | 19.9°C | 30 mm | 82% | 3.1 m/s | 5.5 |
| 2022 | 25.9°C | 23.7°C | 21.5°C | 27.6°C | 20.0°C | 62 mm | 83% | 3.2 m/s | 5.1 |
| 2021 | 24.4°C | 22.3°C | 20.3°C | 26.2°C | 18.3°C | 44 mm | 81% | 4.3 m/s | 5.4 |
| 2020 | 25.8°C | 23.6°C | 21.3°C | 28.3°C | 20.4°C | 84 mm | 82% | 2.9 m/s | 5.3 |
| 2019 | 25.5°C | 23.6°C | 21.6°C | 27.5°C | 20.8°C | 54 mm | 83% | 3.5 m/s | 5.2 |
| 2018 | 25.2°C | 23.5°C | 21.7°C | 27.0°C | 20.9°C | 185 mm | 86% | 3.5 m/s | 4.7 |
| 2017 | 25.0°C | 23.1°C | 21.3°C | 26.5°C | 20.6°C | 293 mm | 85% | 3.8 m/s | 5 |
| 2016 | 24.0°C | 22.4°C | 20.8°C | 25.4°C | 19.4°C | 275 mm | 85% | 4.5 m/s | 5 |
| 2015 | 25.8°C | 23.8°C | 21.9°C | 27.0°C | 21.1°C | 127 mm | 85% | 3.6 m/s | 5.2 |
| 2014 | 24.9°C | 23.2°C | 21.5°C | 26.2°C | 20.6°C | 158 mm | 86% | 3.5 m/s | 4.8 |
| 2013 | 24.7°C | 22.8°C | 20.9°C | 26.7°C | 19.5°C | 86 mm | 84% | 3.4 m/s | 4.9 |
| 2012 | 24.7°C | 22.5°C | 20.3°C | 26.4°C | 19.6°C | 16 mm | 81% | 3.6 m/s | 5.3 |
| 2011 | 23.3°C | 21.6°C | 19.8°C | 24.0°C | 19.1°C | 94 mm | 83% | 3.9 m/s | 5 |
| 2010 | 23.9°C | 22.0°C | 20.2°C | 25.3°C | 19.2°C | 156 mm | 83% | 4 m/s | 4.9 |
| 2009 | 24.9°C | 23.2°C | 21.4°C | 26.4°C | 20.4°C | 80 mm | 86% | 3.8 m/s | 5.1 |
| 2008 | 23.6°C | 21.8°C | 20.1°C | 24.9°C | 19.5°C | 129 mm | 84% | 3.9 m/s | 4.7 |
| 2007 | 23.7°C | 22.0°C | 20.4°C | 24.8°C | 19.5°C | 101 mm | 82% | 4.5 m/s | 5.3 |
| 2006 | 24.7°C | 23.0°C | 21.3°C | 27.3°C | 20.0°C | 365 mm | 85% | 3.9 m/s | 4.6 |
| 2005 | 23.6°C | 22.0°C | 20.5°C | 25.2°C | 19.5°C | 353 mm | 85% | 4.6 m/s | 5 |
| 2004 | 24.4°C | 22.8°C | 21.2°C | 25.6°C | 20.1°C | 337 mm | 85% | 4.1 m/s | 4.7 |
| 2003 | 25.0°C | 23.0°C | 21.0°C | 27.2°C | 19.9°C | 79 mm | 82% | 3.6 m/s | 5.3 |
| 2002 | 24.1°C | 22.3°C | 20.5°C | 26.0°C | 19.3°C | 202 mm | 85% | 3.9 m/s | 4.9 |
| 2001 | 23.8°C | 22.1°C | 20.4°C | 25.8°C | 19.3°C | 497 mm | 85% | 4.4 m/s | 5.2 |
| 2000 | 24.5°C | 22.5°C | 20.4°C | 26.1°C | 19.2°C | 19 mm | 81% | 4.6 m/s | 5.1 |
| 1999 | 24.2°C | 22.0°C | 19.7°C | 25.4°C | 19.1°C | 47 mm | 80% | 4 m/s | 5.1 |
| 1998 | 24.4°C | 22.3°C | 20.2°C | 25.5°C | 19.0°C | 4 mm | 79% | 4.7 m/s | 5.1 |
| 1997 | 25.5°C | 23.3°C | 21.1°C | 27.2°C | 20.0°C | 33 mm | 76% | 4.4 m/s | 5.1 |
| 1996 | 25.8°C | 23.6°C | 21.4°C | 27.6°C | 20.3°C | 4 mm | 77% | 4.4 m/s | 5.2 |
| 1995 | 25.1°C | 23.1°C | 21.2°C | 26.1°C | 20.3°C | 4 mm | 77% | 4.7 m/s | 5 |
| 1994 | 25.2°C | 23.0°C | 20.8°C | 27.4°C | 19.6°C | 4 mm | 78% | 4.5 m/s | 5.3 |
| 1993 | 25.5°C | 23.4°C | 21.2°C | 28.0°C | 19.7°C | 8 mm | 79% | 4.2 m/s | 4.5 |
| 1992 🔥 | 26.1°C | 24.0°C | 21.8°C | 28.2°C | 21.0°C | 5 mm | 79% | 3.8 m/s | 4.8 |
| 1991 | 24.9°C | 22.8°C | 20.6°C | 26.6°C | 19.7°C | 3 mm | 80% | 3.6 m/s | 4.8 |
| 1990 | 24.6°C | 22.8°C | 20.9°C | 26.4°C | 20.1°C | 74 mm | 84% | 4.3 m/s | 4.8 |
| 1989 | 25.2°C | 23.2°C | 21.2°C | 26.9°C | 20.2°C | 17 mm | 82% | 3.7 m/s | 4.4 |
| 1988 | 25.6°C | 23.4°C | 21.1°C | 27.7°C | 20.2°C | 4 mm | 81% | 3.3 m/s | 4.8 |
| 1987 | 24.6°C | 22.8°C | 21.0°C | 25.9°C | 20.0°C | 115 mm | 83% | 3.9 m/s | 4.5 |
| 1986 | 24.9°C | 23.0°C | 21.1°C | 26.0°C | 19.6°C | 55 mm | 83% | 3.9 m/s | 5.1 |
| 1985 🌧️ | 23.6°C | 21.9°C | 20.3°C | 25.2°C | 18.4°C | 714 mm | 85% | 4.1 m/s | 4.2 |
| 1984 | 24.9°C | 22.8°C | 20.8°C | 26.2°C | 19.6°C | 30 mm | 82% | 3.2 m/s | 5 |
| 1983 ❄️ | 23.1°C | 21.4°C | 19.8°C | 25.3°C | 18.4°C | 375 mm | 86% | 4.3 m/s | — |
| 1982 | 23.7°C | 22.1°C | 20.5°C | 25.1°C | 19.3°C | 516 mm | 86% | 3.7 m/s | — |
| 1981 | 25.3°C | 22.9°C | 20.5°C | 27.1°C | 19.3°C | 21 mm | 81% | 3.8 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 24.7°C with lows near 20.9°C (mean 22.8°C), based on 45 years of NASA POWER data.
October averages 137 mm of rainfall in Hilo, one of the drier months. The wettest on record was 714 mm in 1985.
The hottest October reached 28.3°C in 2020. The coldest dipped to 18.3°C in 2021.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 0.8°C. Daytime highs moved from 24.1°C to 25.2°C and overnight lows from 20.4°C to 20.9°C over the same span.
October is one of the warmer months of the year in Hilo and one of the drier months, so plan for around 24.7°C daytime highs and 20.9°C at night.
Not quite — October is the 10th coolest month in Hilo, averaging 22.8°C.
For October in Hilo, pack light layers you can adjust through the day, with typical highs of 24.7°C and lows of 20.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 83% — quite humid.
Average wind speed in October is 3.9 m/s. The windiest October on record averaged 4.7 m/s (1995).
The wettest October on record was 1985 with 714 mm. On average, October sees 137 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 Hilo 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.
