The best times to visit Hachijo Jima Island for ideal weather are

April 2nd to July 8th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.



Other Hachijo Jima Island Travel Info

Weather in Hachijo Jima Island


Average temperatures in Hachijo Jima Island vary greatly. Considering humidity, temperatures feel nice most of the year, excluding some cold weeks in the winter, with a chance of rain or snow throughout most of the year. The area is less temperate than some — in the 32nd percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Hachijo Jima Island, the hottest months are August, July, and then September. See average monthly temperatures below. The warmest time of year is generally mid August where highs are regularly around 86°F (30°C) with temperatures rarely dropping below 76.6°F (24.8°C) at night.

Hachijo Jima Island Temperatures (Fahrenheit)


Hachijo Jima Island Temperatures (Celsius)


“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Hachijo Jima Island Perceived Temperature (F)


Hachijo Jima Island Perceived Temperature (C)



Average Hachijo Jima Island Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 54.6 49.5 44.4
Feb 56.5 50.8 44.8
Mar 60.3 54.4 47.9
Apr 65.7 59.9 54.1
May 71.5 65.6 60.1
Jun 74.6 70 66
Jul 82.1 77.2 73.4
Aug 85.6 79.6 75.4
Sep 81.4 75.7 71.2
Oct 75 69.7 65
Nov 67.8 62.3 57.1
Dec 59.3 54 48.8

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 12.6 9.7 6.9
Feb 13.6 10.4 7.1
Mar 15.7 12.4 8.8
Apr 18.7 15.5 12.3
May 21.9 18.7 15.6
Jun 23.7 21.1 18.9
Jul 27.8 25.1 23
Aug 29.8 26.4 24.1
Sep 27.4 24.3 21.8
Oct 23.9 20.9 18.3
Nov 19.9 16.8 13.9
Dec 15.2 12.2 9.3



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Hachijo Jima Island are July, August, and then May. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around late July. For example, on the week of July 23rd there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in early October with an average of 4 days of significant precipitation the week of October 1st.

When can you find snow in Hachijo Jima Island? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Hachijo Jima Island.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Hachijo Jima Island (in).

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 37% 0 7.6
Feb 48% 0 10.5
Mar 43% 0 10.2
Apr 40% 0 9.8
May 36% 0 14.1
Jun 45% 0 15.2
Jul 27% 0 9.5
Aug 30% 0 7.5
Sep 41% 0 10.1
Oct 50% 0 19.8
Nov 46% 0 12.6
Dec 40% 0 8.7

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 37 0 19.3
Feb 48 0 26.7
Mar 43 0 25.9
Apr 40 0 24.9
May 36 0 35.8
Jun 45 0 38.6
Jul 27 0 24.1
Aug 30 0 19.1
Sep 41 0 25.7
Oct 50 0 50.3
Nov 46 0 32
Dec 40 0 22.1


Humidity and Wind

Hachijo Jima Island has some extremely humid months, with other comfortably humid months. The least humid month is January (58.8% relative humidity), and the most humid month is July (88.5%).

Wind in Hachijo Jima Island is usually moderate. The windiest month is October, followed by February and March. October’s average wind speed of around 10.4 knots (12 MPH or 19.3 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in mid October where average top sustained speeds reach 18.4 knots, which is considered a fresh breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Hachijo Jima Island.

Avg. Relative Humidity


The graph below shows wind speed (max and average) in knots.

Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 9.9 Gentle breeze 15.5 Significant breeze
Feb 10.3 Gentle breeze 16.3 Significant breeze
Mar 10.3 Gentle breeze 16.4 Significant breeze
Apr 9.6 Gentle breeze 15.7 Significant breeze
May 8.8 Gentle breeze 14.7 Significant breeze
Jun 8.4 Gentle breeze 13.8 Significant breeze
Jul 7.8 Gentle breeze 11.9 Significant breeze
Aug 7.1 Gentle breeze 11.3 Significant breeze
Sep 9.2 Gentle breeze 14.3 Significant breeze
Oct 10.4 Gentle breeze 16.4 Significant breeze
Nov 9.4 Gentle breeze 15.2 Significant breeze
Dec 10.1 Gentle breeze 15.7 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 58.8%
Feb 62.8%
Mar 63.1%
Apr 68.8%
May 75.8%
Jun 87.5%
Jul 88.5%
Aug 83.6%
Sep 81.4%
Oct 74.9%
Nov 67.9%
Dec 60.5%


Is it Safe to Travel to Hachijo Jima Island?

Our best data indicates this area is generally safe, except in a few regions. As of Oct 07, 2019 there are regional travel advisories for Japan; exercise normal security precautions and avoid some areas. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Oct 01, 2019.


The Busiest and Least Crowded Months

The busiest month for tourism in Hachijo Jima Island, Japan is January, followed by March and April. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Hachijo Jima Island in December. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month


Most Popular Months to Visit

Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 73.3 in December means 73.3% of the tourists vs. January.



Overall Hachijo Jima Island Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderate. Highs range from 72.8°F (22.7°C) and 58.6°F (14.8°C) with warmer temperatures in the later months. Rain is very common with 11 to 13 days of significant precipitation per month. Spring is the busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see the least precipitation with 8 to 14 days of precipitation per month. June – August is fairly slow season for tourism in Hachijo Jima Island, so lodging and other accommodations may cost slightly less.

Fall (September through November)

Fall daily highs range from 83.5°F (28.6°C) and 64.8°F (18.2°C), which will feel very nice given the humidity and wind. It rains or snows a great amount: 12 to 15 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.

Winter (December through February)

Weather is too cold this time of year in Hachijo Jima Island to be enjoyable for warm weather travelers. The average high during this season is between 61.6°F (16.4°C) and 54.2°F (12.3°C). On average, it rains or snows a great amount: 12 to 13 times per month. These times of year are the second busiest with tourists.


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