Hachijojima Climate by Month
The temperature in Hachijojima can vary quite a bit throughout the year.
Temperatures can be warm during the warmest months,
and mild during the cooler months.
It also experiences much rainfall throughout the year.
Now, let’s break down all the climate details for a clearer picture.
Average day and night temperature
Visitors to Hachijojima can expect significant temperature changes throughout the year. Average daytime temperatures reach a comfortable 29°C in August. In February, the coolest month of the year, temperatures drop to a moderate 16°C. At night, expect cooler temperatures, averaging 11°C during this month.
The mean minimum and maximum temperatures throughout the year
Precipitation and rainy days
Hachijojima is known for its substantial rainfall, with annual precipitation reaching 2300 mm. Hachijojima can be quite wet during June, receiving approximately 323 mm of precipitation over 19 rainy days. In contrast August, experiences much drier conditions, with 116 mm of rainfall, spread across 16 rainy days.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
Hachijojima can be enjoyed more throughout the sunniest month of August under a blue sky, with approximately 6.2 hours of sunshine daily. In contrast, the city experiences much darker days in January, with only 2.9 hours of sunlight per day.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average water temperature
The mean water temperature over the year in Hachijojima ranges from 17°C in March to 27°C in August.
Water temperature over the year
Average humidity
The relative humidity is moderate throughout the year in Hachijojima.
Relative humidity over the year
Average wind speed
The mean wind speed over the year in Hachijojima ranges from 4°C in July to 6°C in January.
The mean monthly wind speed over the year (meters per second)
The best time of year to visit Hachijojima in Japan
During the months of April, May, June, October and November you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.The average rainfall figures in Hachijojima are quite high. Throughout the year, you have a chance of prolonged precipitation. So no matter what time of year you go, you will always have to deal with a high number of rainy days. This makes it more challenging to point out the best time of year to visit. If we needed to pick one month we would choose August which is the sunniest month of the year.
Other facts from our historical weather data:
August has an average maximum temperature of 29°C and is the warmest month of the year.
The coldest month is February with an average maximum temperature of 16°C.
June tops the wettest month list with 323 mm of rainfall.
August is the driest month with 116 mm of precipitation.
August is the sunniest month with an average of 187 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
