The best times to visit Izu Oshima for ideal weather are
April 9th 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.
Izu Oshima Travel Guide
Other Izu Oshima Travel Info
Weather in Izu Oshima
Average temperatures in Izu Oshima 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 29th 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 Izu Oshima, the hottest months are August, July, and then September. See average monthly temperatures below. The warmest time of year is generally early to mid August where highs are regularly around 87.1°F (30.6°C) with temperatures rarely dropping below 75.2°F (24°C) at night.
Izu Oshima Temperatures (Fahrenheit)
Izu Oshima Temperatures (Celsius)
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.
Izu Oshima Perceived Temperature (F)
Izu Oshima Perceived Temperature (C)
Average Izu Oshima 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.
|Month||Avg. High (°F)||Avg. Mean (°F)||Avg. Low (°F)|
|Month||Avg. High (°C)||Avg. Mean (°C)||Avg. Low (°C)|
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Izu Oshima are January, August, and then December. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early January. For example, on the week of January 1st there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in mid June with an average of 4 days of significant precipitation the week of June 18th.
When can you find snow in Izu Oshima? 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 Izu Oshima.
Snow on the Ground
The graph below shows the average snow on the ground in Izu Oshima (in).
Average Rain and Snow by Month
|Month||Daily Chance of Rain||Average Snow Depth (in)||Total Precipitation (in)|
|Month||Daily Chance of Rain||Average Snow Depth (cm)||Total Precipitation (cm)|
Humidity and Wind
Izu Oshima has some extremely humid months, with other comfortably humid months. The least humid month is January (54.8% relative humidity), and the most humid month is July (84.6%).
Wind in Izu Oshima is usually moderate. The windiest month is December, followed by March and April. December’s average wind speed of around 11.2 knots (12.9 MPH or 20.8 KPH) is considered “a moderate breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early March where average top sustained speeds reach 18.8 knots, which is considered a fresh breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Izu Oshima.
The graph below shows wind speed (max and average) in knots.
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||15.9||Significant breeze|
|Feb||10.2||Gentle breeze||16.3||Significant breeze|
|Mar||10.9||Gentle breeze||17.6||Significant breeze|
|Apr||10.4||Gentle breeze||16.3||Significant breeze|
|May||9.3||Gentle breeze||15||Significant breeze|
|Jun||8.1||Gentle breeze||13.8||Significant breeze|
|Jul||8.9||Gentle breeze||13.8||Significant breeze|
|Aug||8.4||Gentle breeze||12.9||Significant breeze|
|Sep||8.8||Gentle breeze||14||Significant breeze|
|Oct||9.6||Gentle breeze||15||Significant breeze|
|Nov||9.9||Gentle breeze||15.5||Significant breeze|
|Dec||11.2||Significant breeze||17.6||Strong breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to Izu Oshima?
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 Izu Oshima, 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 Izu Oshima 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
Overall Izu Oshima Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderate. Highs range from 73.8°F (23.2°C) and 54.1°F (12.3°C) with warmer temperatures in the later months. Rain is somewhat common with 9 to 10 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 moderate precipitation with 6 to 12 days of precipitation per month. June – August is fairly slow season for tourism in Izu Oshima, so lodging and other accommodations may cost slightly less.
Fall (September through November)
Fall daily highs range from 83.7°F (28.7°C) and 60.1°F (15.6°C), which will feel very nice given the humidity and wind. It rains or snows a significant amount: 8 to 11 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 Izu Oshima to be enjoyable for warm weather travelers. The average high during this season is between 58.1°F (14.5°C) and 50.1°F (10.1°C). On average, it rains or snows a fair amount: 6 to 8 times per month. These times of year are the second busiest with tourists.