August Weather in Hachijo, Japan

Last updated: August 23, 2025

In August, the average temperature in Hachijo, Japan reaches a warm 28°C (82°F), with a minimum of 25°C (77°F) and a maximum of 30°C (87°F). During this time, you can expect approximately 83 mm (3.3 in) of precipitation spread over 10 days, and the average humidity is notably high at 85%.

August Temperature in Hachijo

In August in Hachijo, the average temperature is 28°C (82°F). Maximums can reach 30°C (87°F), and minimums can be as low as 25°C (77°F). It's a perfect time to enjoy warm weather and outdoor activities in Hachijo.

August Weather in Hachijo: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Hachijo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hachijo, August typically has an average temperature of 28°C (82°F), with highs reaching up to 30°C (87°F) and lows dropping to around 25°C (77°F).

Data source: Temperature data for Hachijo generated using information from the Copernicus Climate Change Service.

August Precipitation in Hachijo

In Hachijo in August, the total precipitation amount is 83 mm (3.3 in) over a span of 10 days.

August Precipitation Trends in Hachijo

The chart displays monthly precipitation patterns in Hachijo, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Hachijo, August typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 10 days.

Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

August Humidity in Hachijo

In Hachijo in August humidity is 85%. With an average temperature of 28°C (82°F), this humidity feels like a warm blanket enveloping you, making outdoor activities a sweaty endeavor and requiring frequent breaks to stay refreshed.

August Average Humidity in Hachijo

This chart illustrates the average monthly humidity levels in Hachijo, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Hachijo is approximately 85%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Hachijo

In Hachijo in August, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Hachijo.

Maximum UV Index Levels in Hachijo for August

The chart shows the monthly maximum UV Index (UVI) for Hachijo in August, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In August, the maximum UV index in Hachijo typically reaches 11, which falls under the extreme exposure category.

Data source: Hachijo August UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How August Weather in Hachijo Compares to Other Months

Weather in Hachijo varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Hachijo, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Hachijo, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	13°C (56°F)	130 mm (5.1 inches)	69%	moderate
February Weather	13°C (56°F)	114 mm (4.5 inches)	68%	high
March Weather	15°C (60°F)	201 mm (7.9 inches)	69%	very high
April Weather	18°C (64°F)	133 mm (5.2 inches)	75%	extreme
May Weather	21°C (70°F)	184 mm (7.3 inches)	82%	extreme
June Weather	23°C (74°F)	338 mm (13.3 inches)	88%	extreme
July Weather	26°C (80°F)	170 mm (6.7 inches)	92%	extreme
August Weather	28°C (82°F)	83 mm (3.3 inches)	85%	extreme
September Weather	27°C (80°F)	311 mm (12.3 inches)	82%	very high
October Weather	24°C (75°F)	334 mm (13.1 inches)	78%	high
November Weather	20°C (68°F)	154 mm (6.1 inches)	74%	high
December Weather	16°C (61°F)	133 mm (5.2 inches)	72%	moderate