Hiroshima Weather in December 2026: what to expect (4.2/10)

The month in detail

What to expect in December

In December, Hiroshima sees 11.0°F during the day with 4.5h of sunshine per day. Rain risk remains low (22.0% of days), leaving good room for outdoor activities.

December ranks 10 out of 12 months in Hiroshima. Compared to November: −11°F daytime, −0.6h of sun per day.

This month's conditions

What it's like in December

UV index

3 · moderate

protect during midday hours

Feels like

dry air

2°

Sea

15°C

cold, for the brave

Daylight

9.7h of daylight

Air quality

good

AQI 27

Compare

Is December the right month?

The best month in Hiroshima is May (7.8/10), 3.6 pts higher than December.

See May →See all 12 months →

Context

Our verdict

Hiroshima is one of Japan's major historic destinations: the city rebuilt after the atomic bombing of 6 August 1945 (140,000 deaths in the long term). May is my favorite month (8.2/10): 55-72°F, 30% rain, mild temperatures before the monsoon.

Read Gilles' full review →

Book

Plan your trip

Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.

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Stay

Hotels & rentals · Hiroshima

Expedia →

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Activities

Tours, tickets, experiences

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Flights

Multi-airline comparator

Kiwi →

🎟️ Activities & tours · Hiroshima

GetYourGuide selection · free cancellation

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Affiliate link · GetYourGuide

Practical info

What you need to know before you go

Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a beach trip.

Country · Japan

🗣️LanguageJapanese

💶CurrencyYen japonais (¥)

🚗DrivingLeft-hand

🛡️Safety ⓘSafe · 2/5

💰Cost of living ⓘModerate · 3/5

🌡️ Climate

🌍Climate typeTemperate oceanic

📈Climate trend ⓘStable

🔥Hottest monthAugust · 88°F

❄️Coolest monthJanuary · 48°F

🌧️Rainiest month ⓘJune · 48%

🏖️ Beach trip

📅Peak seasonJuin → Sept

🏖️Swell (Sept–Mar) ⓘModérée

Explore

Other destinations in December

If December doesn't convince you for this destination, compare with others.

Similar climate

Nearby

BusanSouth Korea321 km

Other top picks

🗺️ See all 754 destinations on the map

Location

Where is Hiroshima ?

Global position + regional geographic context.

🌍 World

🔍 Geographic context

Japan

Temperate oceanic climate with a 7.8 → 4.2 gap between best and worst month. 10 years of ERA5 data to choose by project.

34.40°N · 132.46°E

Questions

Frequently asked questions

What is the best time to visit Hiroshima?

May is the best month with 72°F highs, 55°F lows, 6.8h of sunshine and 30.0% rainy days. The months of May & September offer comparable conditions.

How many hours of sunshine does Hiroshima get in May?

Hiroshima averages 6.8 sunshine hours per day in May. It is the sunniest month with a climate score of 7.3/10.

What is the rainiest month in Hiroshima?

January is the most unfavourable month with January has the lowest climate score of the year and the lowest climate score of the year.

What are the temperatures at night in Hiroshima in May?

In May, overnight lows reach 55°F, while afternoon highs average 72°F.

Is Hiroshima good in winter?

In winter (December-February), Hiroshima scores 4.0/10 on average — Difficult period — prefer the peak season.. The best month overall remains May with a score of 7.3/10.

When should you avoid Hiroshima?

January is the most difficult month to visit Hiroshima, with January has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.

Can you swim in Hiroshima in December?

In December, the sea averages 59°F in Hiroshima: cold, for the brave. Best left to hardened swimmers or those with a wetsuit.

Do you need sun protection in Hiroshima in December?

The average UV index reaches 3 in December in Hiroshima (moderate), with about 9.7h of daylight. Protect during midday hours.