Japan Hiroshima Weather in August — Climate Guide
August in Hiroshima is moderate
Hiroshima Weather in August — Quick Answer
As of 2026- Avg temp
- 33° / 24°
- Rainfall
- 130mm · 8 days
- Crowds
- Very busy
As of 2026, Hiroshima in August averages a high of 33°C and low of 24°C with 130mm of rain over about 8 days. Hottest. T-shirt + shorts + UV.
August is moderate for Hiroshima.
Aug 6 Peace Memorial Ceremony is most-emotional Hiroshima day. Hotels triple, book 6+ months ahead. Hottest month.
Travel score
Hiroshima August Weather Stats
Avg High
33°C
Avg Low
24°C
Rainy Days
8
130mm total
Sunshine
8h
Daily avg
Humidity
73%
high
UV Index
10
Very high
Wind
7 km/h
Gusts 18
Sea Temp
28°C
swimming peak
Crowds
Very busy
At attractions
August Sunrise & Sunset
Air Quality
PM2.5
16 μg/m³
PM10
26 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
37°C
Nighttime
25°C
Humidity and wind affect how the actual temperature feels.
Wind
7 km/h
Max gust 18 km/h
Activities Recommended for August
August Travel Pros & Cons
Pros
- Peace Memorial Ceremony Aug 6
- Beach swimming peak
- Drier than July
Cons
- 33°C+ peak heat
- Aug 6 hotels triple
- Obon mid-August holidays surge
August Events & Festivals
- Peace Memorial Ceremony Aug 6 (08:15)
- Obon mid-August
Hiroshima in August — Full Picture
Aug 6 Peace Memorial Ceremony is most-emotional Hiroshima day. Hotels triple, book 6+ months ahead. Hottest month.
What to Wear & What to Pack
Hottest. T-shirt + shorts + UV.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
18.7°C
9.7°C
10/mo
Summer (Jun·Jul·Aug)
Current30.3°C
22.3°C
10.7/mo
Autumn (Sep·Oct·Nov)
23°C
14°C
7.3/mo
Winter (Dec·Jan·Feb)
11°C
2.7°C
6.7/mo
Hiroshima Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 10° | 2° | 7d·50mm | 5h | 65% | 2 | Quiet | Low season | |
| 11° | 2° | 7d·60mm | 6h | 65% | 3 | Quiet | Low season | |
| March (Best) | 14° | 5° | 10d·110mm | 7h | 65% | 4 | Very busy | Peak |
| April (Best) | 19° | 10° | 10d·130mm | 8h | 65% | 6 | Very busy | Peak |
| 23° | 14° | 10d·130mm | 8h | 70% | 7 | Very busy | Peak | |
| 27° | 19° | 13d·230mm | 5h | 75% | 7 | Moderate | Shoulder | |
| 31° | 24° | 11d·250mm | 6h | 75% | 9 | Busy | Peak | |
| 33° | 24° | 8d·130mm | 8h | 73% | 10 | Very busy | Peak | |
| 29° | 20° | 10d·200mm | 6h | 75% | 6 | Moderate | Shoulder | |
| October (Best) | 23° | 14° | 6d·100mm | 7h | 70% | 5 | Busy | Peak |
| November (Best) | 17° | 8° | 6d·80mm | 5h | 65% | 3 | Busy | Peak |
| 12° | 4° | 6d·50mm | 5h | 65% | 2 | Moderate | Shoulder |
View Other Months
Hiroshima August Hotel Picks
Frequently Asked Questions
Is August a good time to visit Hiroshima?
Hiroshima in August is moderate. Tourist crowds are very busy and flight/hotel prices are peak.
What's the average temperature in Hiroshima in August?
Hiroshima August averages a high of 33°C and a low of 24°C.
Does it rain much in Hiroshima in August?
Hiroshima August averages 130mm of rainfall over about 8 rainy days.
What should I wear in Hiroshima in August?
Hottest. T-shirt + shorts + UV.
What time are sunrise and sunset in Hiroshima in August?
Hiroshima August sunrise is 05:40 and sunset is 18:55, with 13h 15min of daylight.
What's the air quality like in Hiroshima in August?
Hiroshima August air quality (AQI) averages 45, rated Good. PM2.5 averages 16μg/m³.
What activities are recommended in Hiroshima in August?
In August, Hiroshima is great for Peace Memorial Ceremony Aug 6 (book 6+ mo ahead), Beach + Miyajima, Indoor museums.
Is August peak season in Hiroshima?
Hiroshima August crowds are very busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit Hiroshima
View Other Months
Planning a August trip to Hiroshima?
You've checked the weather — next come the budget and the route.
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.