Hiroshima September weather
Hiroshima, Japan · September
A transition month; Miyajima plans may need flexibility
September can still feel hot in the daytime, while evenings begin to hint at autumn. The feel often swings within the month.
If typhoon influence passes nearby, rain and wind can arrive strongly and disrupt transfers. Miyajima ferry plans may need more flexibility.
September averages at a glance
Average low
around 21–23°C
Average high
around 28–30°C
Average rainfall
around 150–240 mm
Rainy days
about 8–11 days
What to wear in September in Hiroshima
Actual feel will change with wind and rain, but use the suggestions below to build a comfortable layered outfit.
- • Short sleeves by day with a thin layer in the evening is common.
- • A folding umbrella and water-safe pouch help on heavy-rain days.
- • Indoor AC plus cooler evenings can make thin layers feel useful.
Travel tips for visiting Hiroshima in September
- • If typhoon forecasts appear, reduce outdoor dependence and keep indoor options ready.
- • If possible, keep Miyajima on a flexible day based on wind/rain forecasts.
- • Leave slack in the plan; humidity can rebound after rain.
September weather in Hiroshima — FAQ
Q. Is September summer or autumn?
A. It’s a mix. Early September can feel like summer; later days often feel more autumn-like in the evenings.
Q. Can typhoons block Miyajima trips?
A. Not every time, but strong rain and wind can make plans difficult. Flexibility improves stability.
Q. Will evenings feel cool?
A. They can. A thin layer usually covers it well for after-sunset walks.
Explore Hiroshima
These pages are connected so you can compare conditions and decide for yourself.