The best times to visit Hiroshima for ideal weather are
April 9th to June 24th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
Hiroshima Travel Guide
Other Hiroshima Travel Info
Weather in Hiroshima
Average temperatures in Hiroshima vary drastically. Considering humidity, temperatures feel nice some of the year, but often too hot in the summer and cold in the winter with a chance of rain or snow throughout most of the year. The area is less temperate than some — in the 26th 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 Hiroshima, 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 92.6°F (33.7°C) with temperatures rarely dropping below 78.2°F (25.7°C) at night.
Hiroshima Temperatures (Fahrenheit)
Hiroshima 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.
Hiroshima Perceived Temperature (F)
Hiroshima Perceived Temperature (C)
Average Hiroshima 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 Hiroshima are January, December, 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 to mid January. For example, on the week of January 8th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in early July with an average of 4 days of significant precipitation the week of July 2nd.
When can you find snow in Hiroshima? Weather stations report a very small amount of seasonal snow likely to be deepest around January, especially close to early January. The best time to ski (if at all) in Hiroshima is often around around January 1st when fresh powder is deepest. 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 Hiroshima.
Snow on the Ground
The graph below shows the average snow on the ground in Hiroshima (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
Hiroshima has some slightly muggy months, with moderately humid months on the other side of the year. The least humid month is April (48.3% relative humidity), and the most humid month is July (65.8%).
Wind in Hiroshima is usually calm. The windiest month is October, followed by November and April. October’s average wind speed of around 7.7 knots (8.9 MPH or 14.3 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 March where average top sustained speeds reach 14.4 knots, which is considered a moderate breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Hiroshima.
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||6.4||Light breeze||12.3||Significant breeze|
|Feb||6.8||Light breeze||12.8||Significant breeze|
|Mar||7.2||Gentle breeze||13.8||Significant breeze|
|Apr||7.2||Gentle breeze||13.2||Significant breeze|
|May||6.6||Light breeze||11.9||Significant breeze|
|Jun||5.7||Light breeze||10.6||Gentle breeze|
|Jul||5.9||Light breeze||11||Significant breeze|
|Aug||6.3||Light breeze||11.3||Significant breeze|
|Sep||7.1||Gentle breeze||12.1||Significant breeze|
|Oct||7.7||Gentle breeze||13.2||Significant breeze|
|Nov||7.3||Gentle breeze||13||Significant breeze|
|Dec||6.8||Light breeze||13.2||Significant breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to Hiroshima?
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 Hiroshima, Japan is February, followed by March and July. 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 Hiroshima in October. 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 Hiroshima Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderate. Highs range from 78.5°F (25.8°C) and 54.5°F (12.5°C) with warmer temperatures in the later months. Rain is somewhat common with 7 to 8 days of significant precipitation per month. Spring is fairly slow for tourism, which makes it a good time for those looking for deals.
Summer (June through August)
The middle-year months have very comfortable weather with high temperatures that are quite warm. These months see the most precipitation with 7 to 10 days of precipitation per month. June – August is the busiest season for tourism in Hiroshima, so lodging and other accommodations may cost more than usual.
Fall (September through November)
Fall daily highs range from 88°F (31.1°C) and 59°F (15°C), which will feel very nice given the humidity and wind. It rains or snows a significant amount: 5 to 6 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 Hiroshima to be enjoyable for warm weather travelers. The average high during this season is between 54.7°F (12.6°C) and 49°F (9.4°C). On average, it rains or snows a fair amount: 4 to 6 times per month. These times of year are the second busiest with tourists.