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.



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)


“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.

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.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 49.2 41.1 33.9
Feb 51.9 43.5 35.6
Mar 57.8 49 39.7
Apr 66.8 57.9 48.1
May 76.2 67.2 57.8
Jun 80.9 73.9 67.4
Jul 87.4 80.9 74.8
Aug 90.8 83.1 76.7
Sep 85.3 76.8 69.5
Oct 75 66.1 57.6
Nov 63.4 55 47.1
Dec 52.7 44.7 37.5

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 9.6 5.1 1.1
Feb 11.1 6.4 2
Mar 14.3 9.4 4.3
Apr 19.3 14.4 8.9
May 24.6 19.6 14.3
Jun 27.2 23.3 19.7
Jul 30.8 27.2 23.8
Aug 32.7 28.4 24.8
Sep 29.6 24.9 20.8
Oct 23.9 18.9 14.2
Nov 17.4 12.8 8.4
Dec 11.5 7.1 3.1



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.

Days with precipitation

Snow on the Ground

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

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 14% 0.4 1.7
Feb 22% 0 3.1
Mar 24% 0 4.7
Apr 28% 0 5.2
May 24% 0 6.2
Jun 31% 0 7.9
Jul 31% 0 10.1
Aug 24% 0 5.5
Sep 20% 0 4.8
Oct 17% 0 4.8
Nov 19% 0 3.7
Dec 16% 0.4 2.9

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 14 1 4.3
Feb 22 0 7.9
Mar 24 0 11.9
Apr 28 0 13.2
May 24 0 15.7
Jun 31 0 20.1
Jul 31 0 25.7
Aug 24 0 14
Sep 20 0 12.2
Oct 17 0 12.2
Nov 19 0 9.4
Dec 16 1 7.4


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.

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 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
Jan 54.6%
Feb 52.6%
Mar 50.3%
Apr 48.3%
May 50.3%
Jun 63.2%
Jul 65.8%
Aug 61.7%
Sep 57.9%
Oct 54.7%
Nov 56.6%
Dec 56.9%


Is it Safe to Travel to Hiroshima?

Our best data indicates this area is generally safe. As of Dec 04, 2023 there are no travel advisories or warnings for Japan; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Nov 14, 2023.


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

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 very reliable. Displayed data is calculated relative to the peak, so a score of 48 in October means 48% of the tourists vs. February.



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.


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