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Hiroshima weather by month: temperature, rain and what to wear

Hiroshima's average high runs from 9.9°C (50°F) in January to 32.8°C (91°F) in August (JMA, 1991–2020). The wettest month is July (279.8 mm) and the driest is January (46.2 mm).

Updated

32.8°CAugust
9.9°CJanuary
1,572 mmprecipitation

Hiroshima weather month by month

Averages for 1991–2020 at the JMA's Hiroshima station (4 m above sea level). Each month links to its own page.

Hiroshima by month: averages for 1991–2020 (JMA)
MonthHighLowPrecipitationWet daysSunshine
January9.9°C2.0°C46.2 mm5.5 days139 hours
February10.9°C2.4°C64.0 mm6.9 days140 hours
March14.5°C5.1°C118.3 mm9.0 days177 hours
April19.8°C10.1°C141.0 mm8.8 days192 hours
May24.4°C15.1°C169.8 mm8.6 days211 hours
June27.2°C19.8°C226.5 mm10.7 days155 hours
July30.9°C24.1°C279.8 mm10.6 days173 hours
August32.8°C25.1°C131.4 mm7.6 days207 hours
September29.1°C21.1°C162.7 mm8.5 days167 hours
October23.7°C14.9°C109.2 mm6.2 days179 hours
November17.7°C8.9°C69.3 mm6.1 days153 hours
December12.1°C4.0°C54.0 mm5.7 days141 hours

Average high in Hiroshima, month by month (°C)

Jan9.9°C
Feb10.9°C
Mar14.5°C
Apr19.8°C
May24.4°C
Jun27.2°C
Jul30.9°C
Aug32.8°C
Sep29.1°C
Oct23.7°C
Nov17.7°C
Dec12.1°C
The red torii gate of Itsukushima Shrine standing in the sea at Miyajima, with mountains behind
Photo: Itsukushima Gate.jpg by JordyMeow (CC BY-SA 3.0, cropped), via Wikimedia Commons.

When to go to Hiroshima, by the numbers

  • Months with average highs between 15°C and 25°C and fewer than 10 wet days: April, May, October and November.
  • Fewest wet days: January (5.5 days).
  • Quietest hotels in 2025 (Hiroshima Prefecture): January (51.9%), February (58.5%) and June (59.5%).
  • Busiest hotels in 2025 (Hiroshima Prefecture): October (72.4%), November (72.3%) and August (67.8%).
  • Plum blossom: around 6 February on average.
  • Cherry blossom: around 25 March on average.
  • Hydrangea: around 10 June on average.
  • Autumn leaves (maple): around 22 November on average.
  • Ginkgo turns yellow: around 15 November on average.

What to wear in Hiroshima, month by month

Hiroshima: our clothing level for each month (from the JMA's averages)
MonthLevelAverage highWet days
JanuaryCold9.9°C5.5 days
FebruaryChilly10.9°C6.9 days
MarchChilly14.5°C9.0 days
AprilCool19.8°C8.8 days
MayMild24.4°C8.6 days
JuneWarm27.2°C10.7 days
JulyHot30.9°C10.6 days
AugustHot32.8°C7.6 days
SeptemberWarm29.1°C8.5 days
OctoberMild23.7°C6.2 days
NovemberCool17.7°C6.1 days
DecemberChilly12.1°C5.7 days

How busy Hiroshima is, month by month

How full hotels across Hiroshima Prefecture were, month by month in 2025 (%)

Average room occupancy for all hotels and inns (Japan Tourism Agency).

Jan51.9%
Feb58.5%
Mar64.1%
Apr67.5%
May67.5%
Jun59.5%
Jul63.0%
Aug67.8%
Sep66.5%
Oct72.4%
Nov72.3%
Dec60.6%

Events in Hiroshima through the year

Events in Hiroshima: dates from each organizer's official page
EventMonthWhen
Hiroshima DreaminationひろしまドリミネーションDec and JanEarly December to late January (4 December 2026 to 24 January 2027) Official page
Hiroshima Castle Oyster Festival広島城オイスターフェスFebMid-February, two days (14 and 15 February in 2026) Official page
Hiroshima Minato Festa広島みなとフェスタMarA weekend in mid-March (14 and 15 March in 2026) Official page
Miyajima Kiyomori Festival宮島清盛まつりMarLate March (28 March in 2027) Official page
Tokasai (Peach Blossom Festival), Itsukushima Shrine桃花祭（嚴島神社）AprEvery year on 15 April, from 17:00 Official page
Tokasai Goshino (Noh offering), Itsukushima Shrine桃花祭御神能（嚴島神社）AprEvery year from 16 to 18 April, about 09:00 to 16:00 Official page
Fire-walking ritual, Daishoin Temple大聖院 火渡り式Apr and NovEvery year on 15 April (spring grand festival) and 15 November (autumn grand festival), from 11:00 Official page
Hiroshima Flower FestivalひろしまフラワーフェスティバルMayEarly May (3 to 5 May in 2026) Official page
Toukasan Grand Festival (Enryuji Temple)とうかさん大祭JunThe first Friday to Sunday of June (5 to 7 June in 2026; 4 to 6 June in 2027) Official page
Kangensai, Itsukushima Shrine (Miyajima)嚴島神社 管絃祭JulThe 17th day of the sixth month of the lunar calendar, so the date changes every year (30 July in 2026) Official page
Peace Memorial Ceremony平和記念式典AugEvery year on 6 August, 8:00 to 8:50 Official page
Peace Message Lantern Floatingピースメッセージとうろう流しAugEvery year on 6 August, in the evening Official page
Mantoe (Ten Thousand Lanterns Service), Daishoin Temple萬燈会（大聖院）SepMid-September, for three days (11 to 13 September in 2026) Official page
Tanomo-san (floating of Tanomo boats), Miyajimaたのもさん（宮島）SepOn the 1st day of the 8th month of the old lunar calendar (11 September in 2026) Official page
Hiroshima Castle Chrysanthemum Exhibition広島城大菊花展Oct and NovLate October to mid-November Official page
Ebisu-ko Autumn Festival (Ebisu Shrine)胡子講（えびす講）NovEvery year from 18 to 20 November Official page

Not held, or changed

Hiroshima Minato Yume Fireworks Festival. Held on 25 July in 2026, from 20:00 to 21:00, offshore of the Hiroshima Port 10,000-ton berth. The organizer plans to move it to the fourth Saturday of September from fiscal year 2027 (Reiwa 9), so check the date before you plan around it. It goes ahead in rain and is cancelled if a typhoon or similar stops it on the day.

Official page

Frequently asked questions

When is the best time to visit Hiroshima?

Months with average highs between 15°C and 25°C and fewer than 10 wet days: April, May, October and November. Fewest wet days: January (5.5 days).

What is the hottest month in Hiroshima?

August has the highest average high, 32.8°C (91°F). January has the lowest, 9.9°C (50°F) (JMA, 1991–2020).

What is the rainiest month in Hiroshima?

July has the most precipitation (279.8 mm), and June has the most wet days (10.7 days) (JMA, 1991–2020).

Related items

Sources for this page

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Back to Japan by month

Compiled by Japan Japan !! · Updated October 2, 2026