Weather in Hilo in August 2025
Average weather
Average temperature in Hilo in August
The expected average maximum temperature in August is +82°F with a maximum of +84°F and a minimum of +66°F.
The average maximum temperature goes up 0% by the end of the month, compared with the beginning of the month, from +82°F to +82°F.
Is Hilo warm or cold in August?
Hilo is typically warm in August.
Maximum temperatures go up compared to the previous month from +82°F to +82°F. The minimum temperature also goes up from +72°F to +72°F.
It’s generally warm, but pack a long-sleeve shirt for evenings.
August is one of the warmest months in Hilo, here is the comparison with other months:
Climate in Hilo in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +82°F | +82°F | +82°F | ||||
| Min. temperature | ||||||
| +64°F | +66°F | +66°F | ||||
| Max. temperature | ||||||
| +93°F | +90°F | +93°F | ||||
| Rainfall | ||||||
| 295 mm | 283 mm | 240 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Humidity | ||||||
| 79% | 79% | 79% | ||||
| Air pressure | ||||||
| 1016 HPa | 1015 HPa | 1015 HPa | ||||
| Sunny days | ||||||
| 0 | 0 | 1 | ||||
| Cloudy days | ||||||
| 1 | 1 | 1 | ||||
| Rainy days | ||||||
| 30 | 30 | 28 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as ok as in July. The temperature levels stay the same in the area of +82°F for average maximum temperature during the day. As August arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 295 mm to 283 mm. Humidity levels don’t change as the month goes on, averaging around 79%. The average wind speed doesn’t change much during August, staying around 2 m/s. The amount of sunny days stay about the same, averaging 0 sunny days during the month.
September brings much the same weather, it remains ok.
Wind
The average wind speed is 2 m/s getting up to 3 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Hilo is gradually increasing during August, going from 2 m/s to 2 m/s over the course of the month.
Rain
How was the weather last August in Hilo?
Climate Change Over the Years
The climate in Hilo in August has not changed that much over the last 43 years.
The average temperature was the lowest in 1999 (+79°F) and the highest in 2015 (+83°F). The driest year was 1983 with only 1515 mm of rainfall, and the wettest year was 1990 with 6234 mm.
FAQ
Is August a good time to visit Hilo?
Can you sunbathe in Hilo in August?
Is Hilo rainy in August?
Is it sunny in Hilo in August?
Other cities in USA
Monthly weather in Hilo
Source of the data
For this page, we’ve looked at the typical weather in Hilo, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
