2026 Climate Averages

Weather: Hiroshima — September

It's a rainy period, but great for indoor activities, museums, and lower prices.

☔ Climate Overview

September is a wet time to visit Hiroshima. Hot conditions with temperatures reaching 31°C—stay hydrated and seek shade. Rain is common, so pack an umbrella. Being off-peak, you'll find better deals and fewer crowds.

7.4
GoTripzi Score Great

Based on weather comfort, crowds, prices, and activity options

Avg High

31°C

Avg Low

23°C

Rainy days

13days

Daylight

12.4h

Feels like 35°C / 27°C — humidity makes it feel warmer

Rainfall

173mm

Sunshine

8.5h/day

Humidity

77%

Muggy
Sun Strength

5.8

High
Wind

12 km/h (gusts 34)

Is September a good time to visit Hiroshima?

It's a rainy period, but great for indoor activities, museums, and lower prices.

Now

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Feels like --
Wind --
Humidity --
UV Index --
Local time —

Air Quality

Travel Context

  • Crowds
    Quiet
  • Travel Costs Shoulder Rates

Daylight

Sunrise

05:54

Sunset

18:19

12.4h daylight

Visiting Hiroshima in September: Pros & Cons

Pros

  • Fewer crowds and better hotel deals

Things to Do in September

Recommended for This Weather

🌅 Early morning sightseeing (before the heat)
🏛️ Museums & galleries
🍳 Cooking classes & food tours
🎭 Cultural tours & local experiences

Hiroshima Weather by Month

Month Avg High Avg Low Rain Sunshine Humidity UV Index Crowds Condition
Jan 11°C 3°C 8d (57mm) 7.3h
72% Humid
3.5 Moderate
Good
Feb 11°C 3°C 10d (74mm) 7.9h
70% Humid
4.7 Moderate
Good
Mar 17°C 7°C 13d (126mm) 8.2h
69% Humid
6.1 High
Excellent
Apr 21°C 11°C 10d (133mm) 8.9h
66% Humid
7.6 Very High
Excellent
May 25°C 16°C 10d (163mm) 9h
70% Humid
7.8 Very High
Good
Jun 28°C 21°C 15d (230mm) 8.5h
77% Humid
7.3 Very High
Wet
Jul 32°C 25°C 16d (275mm) 9.5h
80% Very Muggy
7.3 Very High
Wet
Aug 34°C 26°C 15d (263mm) 10.1h
77% Muggy
7.3 Very High
Wet
Sep Current 31°C 23°C 13d (173mm) 8.5h
77% Muggy
5.8 High
Wet
Oct 24°C 15°C 8d (72mm) 8.2h
73% Humid
5.2 High
Excellent
Nov 19°C 9°C 6d (79mm) 8h
74% Humid
4 Moderate
Excellent
Dec 12°C 4°C 8d (48mm) 7.3h
72% Humid
3.2 Moderate
Good

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Where to Stay

See hotels, apartments & rentals around Hiroshima – live prices from Booking.com, Expedia, Vrbo and more

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Hiroshima

Peace Memorial with Peace Memorial Park and Miyajima Island & Itsukushima Shrine, floating shrine at Miyajima, and okonomiyaki cuisine.

View Full Destination Guide

What to Pack for September

Light, breathable fabrics like cotton and linen are essential. Opt for loose-fitting clothing in light colors to stay cool. A waterproof jacket and shoes are non-negotiable — showers are frequent.

Moderate Quiet

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📋Essentials
👕Clothing
👟Footwear
🎒Accessories
🧴Toiletries & Health

Planning a trip to Hiroshima?

💰 Off-peak — great deals available now

Frequently Asked Questions

Is September a good time to visit Hiroshima?
September is typically wet for visiting Hiroshima, with average highs of 31°C and around 13 rainy days. Plan your activities accordingly—outdoor sightseeing is best on dry days, while rainy days are perfect for museums and indoor attractions.
Does it get cold at night in Hiroshima in September?
Nights stay pleasantly warm in Hiroshima during September, around 23°C. Light evening wear is sufficient, and outdoor dining is very comfortable. Many locals and visitors enjoy late-night walks and outdoor activities after sunset.
What should I pack for Hiroshima in September?
With highs of 31°C and lows of 23°C in September, we recommend: Compact umbrella, Waterproof jacket/shell, Lightweight breathable clothes, Sunscreen SPF 30+. Layering is key as temperatures can vary between air-conditioned interiors and outdoors. Comfortable walking shoes are essential for cobblestone streets.
Does it rain a lot in Hiroshima in September?
Hiroshima typically sees around 13 rainy days in September. Rain is usually in the form of brief showers rather than all-day downpours, so a compact umbrella is sufficient. Mornings tend to be drier, making them ideal for outdoor sightseeing.
How many hours of daylight are there in Hiroshima in September?
In September, Hiroshima gets approximately 12.4 hours of daylight per day. This affects how much sightseeing you can fit in—longer days mean more time for outdoor activities, while shorter days are perfect for cozy museum visits and early dinners.
Is September peak season in Hiroshima?
No, September is not peak season in Hiroshima. Expect better value on accommodation, shorter queues at attractions, and fewer tourists at popular spots. This is an excellent time to experience the city like a local and enjoy a more authentic atmosphere.

Weather Data: Based on 2020–2025 historical climate data from Open-Meteo

Solar calculations: SunCalc (timezone: Asia/Tokyo)

Last Updated: February 2026

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