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Hilo, Big Island weather in August 2026
Expect daytime maximum temperatures of 75°F in Hilo, Big Island, Hawaii in August based on long-term weather averages. There are 5 hours of sunshine per day on average with 15 days with some rainfall and typically 9.8 inches of rainfall in the month.
- 75°F max day temperature
75 - 5 hours of sunshine per day
- 15 days with some rainfall
15 - 61°F min night temperature
61 - 13 hours of daylight per day
13 - Moderate heat & humidity
M - 9.8 inches of monthly rainfall
9.8 - 11+ (Extreme) UV index
11 - 79°F sea temperature
79
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Recommended for Hawaii
The August weather guide for Hawaii (Hilo, Big Island) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Metric (°C) | Imperial (°F)
More about the USA
How hot is it in Hilo, Big Island in August?
Daytime temperatures usually reach 86°F in Hilo, Big Island in August with high heat and humidity, falling to 72°F at night.
How sunny is it in Hilo, Big Island in August?
There are normally 9 hours of bright sunshine each day in Hilo, Big Island in August - that's 73% of daylight hours.
How warm is the sea around Hilo, Big Island in August?
The average sea temperature around Hilo, Big Island in August is 81°F.
Does it rain in Hilo, Big Island in August?
There are usually 7 days with some rain in Hilo, Big Island in August and the average monthly rainfall is 0.6 inches.
What is the chance of a hurricane in Hilo, Big Island in August?
On average less than 1 day in August in Hilo, Big Island is likely to be affected by the passage of one or more tropical storms.
Hilo, Big Island August sunrise & sunset times
Browse the sunrise and sunset times for Hilo, Big Island in August 2026. Select a month to view Hilo, Big Island sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
| Date | Sunrise times | Sunset times |
|---|---|---|
| Saturday, 1st August 2026 | 05:56 | 18:57 |
| Sunday, 16th August 2026 | 06:01 | 18:48 |
| Monday, 31st August 2026 | 06:05 | 18:36 |
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