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Hiroshima, Japan · Temperate oceanic

Hiroshima: best months to visit

September (8.0/10) · December (4.2/10).

📅 Data updated: October 2026 🛰️ ERA5 · 10 years 📍 34.40°N · 132.46°E
⚡ Quick answer
September
Depends on your goals
8.0/10
☀️ Sep
Top score (8.0/10)
🌤️ May
Alt. (7.9/10)
Dec
Plus rude (4.2/10)
🌊 Seaside☀️ Bright🍴 Gastronomy
Photo par Rap Dela Rea via Unsplash
Decide

When to visit Hiroshima?

The decision rests on several criteria. Climate score, tourist crowds and feasible activities.

Verdict: In Hiroshima, September and May clearly stand out. December concentrates the least favorable conditions.
Top & avoid
🏆 September · 8.0 May · 7.9 October · 7.9 June · 7.8 ⚠️ December · 4.2
4.3
Jan
4.3
Feb
4.4
Mar
7.3
Apr
7.9
May
7.8
Jun
5.4
Jul
5.3
Aug
8.0
Sep
7.9
Oct
7.3
Nov
4.2
Dec
Best period · ≥ 7 Decent period · 4 – 7 Tough conditions · < 4

What you grasp in 5 seconds

Hiroshima offers 6 comfortable months, without any month really to avoid. The gap stays moderate: 8.0 in September vs 4.2 in December.

What to check next

Your tolerance for crowds and budget. The best months concentrate tourist saturation and higher prices. Shoulder seasons offer a good compromise.

Next action

Scroll down to the detailed table to compare month by month, then open the page of the month that interests you.

How we calculate the score

The score combines 4 weighted criteria using 10 years of real climate data (ERA5).

Source : ERA5 · Open-Meteo · 10 years (2016–2025) · Full methodology →

Understand

Compare all 12 months

Month-by-month details: temperature, rain, sunshine, score and verdict.

✅ 6 comfortable months (Apr · May · Jun · Sep · Oct · Nov)
MonthT° minT° maxRain %mm/daySunScoreVerdict
🌥️ January →32°F48°F15%1.7mm4.5h4.3/10Decent period
🌥️ February →34°F50°F18%2.5mm5.0h4.3/10Decent period
🌥️ March →39°F57°F24%3.9mm5.7h4.4/10Decent period
⛅ April →46°F64°F25%5.2mm6.4h7.3/10Best period
☀️ May →55°F72°F24%4.8mm6.8h7.9/10Best period
☀️ June →64°F77°F35%7.6mm5.2h7.8/10Best period
🌥️ July →73°F84°F36%9.2mm5.6h5.4/10Decent period
🌥️ August →75°F88°F30%6.5mm6.7h5.3/10Decent period
☀️ September →70°F82°F34%7.0mm5.6h8.0/10Best period
☀️ October →57°F72°F21%3.5mm5.8h7.9/10Best period
⛅ November →45°F63°F15%2.1mm5.1h7.3/10Best period
🌥️ December →36°F52°F15%1.6mm4.5h4.2/10Decent period
📊 Quick read
Optimal window
Apr → Jun
Good transition
Mar · Jul · Aug · Dec
Tough period
none
🌡️ Detailed conditions (September)
🌡️ Feel
Warm
☀️ UV
6.5 · Moderate-Strong
💧 Humidity feel
67°F · Humid
☔ Rain
34% · 7.0 mm/day
🌅 Sunshine
5.6h/day
10-year trend

Annual temperatures — Hiroshima

Min/max temperature curves observed over the past 10 years (ERA5). Shows climate stability and trend.

T° maxT° meanT° min46°50°54°57°61°64°68°72°201620172018201920202021202220232024202569°F — decade peak (2024)+1.24°F / decade
Tailor

For your trip

A few angles depending on what kind of trip you are planning.

🏖️ Beaches: Jun-Sept🌊 Swell: Sept-Mar🚤 Water activities
Book

Plan your trip

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

🎟️ Activities & tours · Hiroshima

GetYourGuide selection · free cancellation

See all →
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 ⓘJuly · 36%

🏖️ Beach trip

📅Peak seasonJuin → Sept
🏖️Swell (Sept–Mar) ⓘModérée
Explore

Related destinations & guides

If this destination doesn't fit your dates, here are alternatives and guides.

Location

Where is Hiroshima ?

Global position + regional geographic context.

🌍 World
🔍 Geographic context
Temperate oceanic climate with a 8.0 → 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?
September is the best month with 82°F highs, 70°F lows, 5.6h of sunshine and 34.0% rainy days. The months of September & May offer comparable conditions.
How many hours of sunshine does Hiroshima get in September?
Hiroshima averages 5.6 sunshine hours per day in September. It is the sunniest month with a climate score of 7.6/10.
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 September?
In September, overnight lows reach 70°F, while afternoon highs average 82°F.
Is Hiroshima good in winter?
In winter (December-February), Hiroshima scores 4.1/10 on average — Difficult period — prefer the peak season.. The best month overall remains September with a score of 7.6/10.
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.