Hilo Weather in August
During August, Hilo experiences high daytime temperatures of 26°C (79°F) and cooler nights around 20°C (68°F). Expect quite a bit of rainfall. Around 165 mm (6.5 in) is typical.
Rainfall in Hilo in August
On average, there are about 19 days with rain during this month, averaging 165 mm (6.5 in). Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.
Temperature in Hilo in August
August in Hilo brings high temperatures, with highs of 26°C (79°F) and nights around 20°C (68°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. With lows of 20°C (68°F), the nights are warm and generally comfortable. This month tends to be the warmest of the year. Light, comfortable clothing will serve you well.
Sunshine in Hilo in August
The month experiences a moderate amount of sunlight, with 176 hours of sunshine. This provides a nice balance between sunshine and clouds.If you're inclined towards comfortable temperatures and drier conditions, August is a good time to visit Hilo.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Hilo's climate page.
Hilo Temperature in August
Min Temperature
20°C (68°F)
Max Temperature
26°C (79°F)
Chance of Rain
65%
Precipitation
165 mm (6.5 in)
Rainy days
19 days
Humidity
78%
Sunshine
176 hours
Percentage Sunshine
45%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Hilo typically stay consistent throughout August, with daily highs averaging around 26°C (79°F). Nights are warm, with lows around 21°C (70°F).
Average temperatures in August
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in August
Historical weather for Hilo in August
Browse day-by-day weather records for Hilo spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Hilo historical weather extremes in August
Our historical data for Hilo spans 1998 to 2025, revealing these weather extremes.
- Hilo recorded its highest August temperature of 32°C (90°F) on August 28, 2015.
- On August 27, 1998, Hilo saw its coldest August day with temperatures maxing out at 24°C (75°F).
- The coldest night in August in Hilo was on August 23, 1999, with a minimum of 12°C (54°F).
Best Places in the United States of America in August
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in August →
perfect weather
pleasant
tolerable
unpleasant
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What to Wear in Hilo in August
Warm but pleasant conditions in Hilo in August. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Hilo in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Hilo's climate page.
Temperature Rainfall Sunshine Humidity
See the full Hilo climate overview or explore weather in the United States of America.
