Hilo, Hawaii weather in October
Temperature, sea and sunshine in October: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in October
Good
Best time to visit: January – December
What is the weather like in Hilo, Hawaii in October?
In October, Hilo, Hawaii is warm: daytime highs average 26 °C, and even at night it stays warm at around 21 °C. The sea averages 26.5 °C – lovely and warm for swimming. The sun shines for around 7 hours a day. It is the rainy season: rain falls on about 20 days, totalling 97 mm. The air is often humid and muggy. All in all, October is a good month for a holiday in Hilo, Hawaii.
October compared
How the weather changes from September to November. Tap a month to open it.
| SeptemberSep | OctoberOct | NovemberNov | |
|---|---|---|---|
| Score | 66 | 65 | 62 |
| Day | 26° | 26° | 25° |
| Night | 22° | 21° | 21° |
| Sea | 27° | 27° | 26° |
| Sun | 8 h | 7 h | 7 h |
| Rain days | 21 | 20 | 19 |
More details for October
- Daylight
- 11 h 43 min06:14 – 17:58
- UV index
- 9 · very highclear sky, noon (estimate)All months
- Muggy days
- 30 daysdew point 18 °C or moreAll months
- Wind
- 17 km/haverage daily peakAll months
- Cloud cover
- 60 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC−10Pacific/Honolulu
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %73 %
- Few rainy daysweight 30 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Nature escape”.
What to pack in October
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
- Rain jacket or umbrella
Hilo, Hawaii in October: quick answers
Is Hilo, Hawaii hot in October?
Warm rather than hot: in October, daytime highs in Hilo, Hawaii average 26 °C and nights cool to about 21 °C.
Can you swim in Hilo, Hawaii in October?
Yes. In October the sea averages 26.5 °C – lovely and warm for swimming.
Does it rain much in Hilo, Hawaii in October?
It rains often – on about 20 days, adding up to 97 mm.
Hilo, Hawaii month by month
The whole year in Hilo, HawaiiAll destinations: USAHawaii weather in OctoberWhere to go in OctoberSea temperature in October
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences