The best times to visit Irabu for ideal weather are

November 5th to May 13th

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



Other Irabu Travel Info

Weather in Irabu


Average temperatures in Irabu vary somewhat. Considering humidity, temperatures feel nice most of the year, excluding some hot weeks in the summer, with a chance of rain throughout most of the year. The area is less temperate than some — in the 35th 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 Irabu, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally early July where highs are regularly around 90.4°F (32.4°C) with temperatures rarely dropping below 80.4°F (26.9°C) at night.

Irabu Temperatures (Fahrenheit)


Irabu 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.

Irabu Perceived Temperature (F)


Irabu Perceived Temperature (C)



Average Irabu 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 68.4 64.3 60.1
Feb 70.8 66.3 61.7
Mar 72.9 68.2 63.4
Apr 76.3 71.6 66.8
May 81.6 76.8 72.4
Jun 87.1 82.2 78.3
Jul 89.8 84.3 79.8
Aug 88.6 83.5 79.1
Sep 86.9 82.1 77.6
Oct 82.1 77.9 73.9
Nov 77.4 73.3 69.4
Dec 71.1 67 63

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 20.2 17.9 15.6
Feb 21.6 19.1 16.5
Mar 22.7 20.1 17.4
Apr 24.6 22 19.3
May 27.6 24.9 22.4
Jun 30.6 27.9 25.7
Jul 32.1 29.1 26.6
Aug 31.4 28.6 26.2
Sep 30.5 27.8 25.3
Oct 27.8 25.5 23.3
Nov 25.2 22.9 20.8
Dec 21.7 19.4 17.2



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Irabu are July, March, and then October. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early July. For example, on the week of July 2nd there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in early to mid August with an average of 4 days of significant precipitation the week of August 6th.

When can you find snow in Irabu? 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 Irabu.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Irabu (in).

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 34% 0 5.9
Feb 33% 0 4.3
Mar 25% 0 4.2
Apr 26% 0 6.1
May 28% 0 9
Jun 29% 0 7.7
Jul 22% 0 5.2
Aug 33% 0 9
Sep 28% 0 6.9
Oct 26% 0 7.3
Nov 35% 0 7.9
Dec 31% 0 5.2

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 34 0 15
Feb 33 0 10.9
Mar 25 0 10.7
Apr 26 0 15.5
May 28 0 22.9
Jun 29 0 19.6
Jul 22 0 13.2
Aug 33 0 22.9
Sep 28 0 17.5
Oct 26 0 18.5
Nov 35 0 20.1
Dec 31 0 13.2


Humidity and Wind

Irabu has some very humid months, and above average humidity throughout the year. The least humid month is December (63.3% relative humidity), and the most humid month is June (80.6%).

Wind in Irabu is usually moderate. The windiest month is October, followed by November and December. October’s average wind speed of around 10.6 knots (12.2 MPH or 19.7 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 early to mid August where average top sustained speeds reach 16 knots, which is considered a moderate breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Irabu.

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 9.7 Gentle breeze 14.3 Significant breeze
Feb 9 Gentle breeze 13.5 Significant breeze
Mar 9.1 Gentle breeze 13.9 Significant breeze
Apr 8.5 Gentle breeze 13.4 Significant breeze
May 7.7 Gentle breeze 13 Significant breeze
Jun 8.7 Gentle breeze 14 Significant breeze
Jul 8.8 Gentle breeze 13.9 Significant breeze
Aug 8.6 Gentle breeze 13.8 Significant breeze
Sep 8.7 Gentle breeze 13.3 Significant breeze
Oct 10.6 Gentle breeze 15.1 Significant breeze
Nov 10.1 Gentle breeze 14.9 Significant breeze
Dec 10 Gentle breeze 14.9 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 65%
Feb 69.5%
Mar 69.3%
Apr 72.9%
May 77.5%
Jun 80.6%
Jul 75.1%
Aug 77.6%
Sep 74%
Oct 71%
Nov 69.4%
Dec 63.3%


Is it Safe to Travel to Irabu?

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 Irabu, Japan is July, followed by April and November. 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 Irabu in September. 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 56.9 in September means 56.9% of the tourists vs. July.



Overall Irabu Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel warm. Highs range from 84.3°F (29.1°C) and 70.5°F (21.4°C) with warmer temperatures in the later months. Rain is somewhat common with 8 to 9 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 quite warm. These months see moderate precipitation with 7 to 10 days of precipitation per month. June – August is the second busiest season for tourism in Irabu, so lodging and other accommodations may cost slightly more.

Fall (September through November)

Fall daily highs range from 87.5°F (30.8°C) and 74.1°F (23.4°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 fairly slow during these months due to the weather, so hotels may be lower priced.

Winter (December through February)

Weather is perfect this time of year in Irabu to be enjoyable for warm weather travelers. The average high during this season is between 72.7°F (22.6°C) and 67.6°F (19.8°C). On average, it rains or snows a great amount: 9 to 11 times per month. These times of year are the slowest with tourists.


Best Times to TravelJapan › Irabu, Japan