Hiroshima weather in September 2025

Expect daytime maximum temperatures of 27°C in Hiroshima, Japan in September based on long-term weather averages. There are 5 hours of sunshine per day on average with 16 days with some rainfall and typically 186 mm of rainfall in the month.

  • 27°C maximum daytime temperature in September in Hiroshima27
    27°C max day temperature
  • 5 hours of sunshine per day
  • 16 days with some rainfall in September in Hiroshima16
    16 days with some rainfall
  • 19°C minimum night-time temperature in September in Hiroshima19
    19°C min night temperature
  • 12 hours of daylight per day in September in Hiroshima12
    12 hours of daylight per day
  • Moderate heat & humidity in September in HiroshimaM
    Moderate heat & humidity
  • 186 mm monthly rainfall in September in Hiroshima186
    186 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in September in Hiroshima8
    8 (Very High) UV index
  • 25°C sea temperature in September in Hiroshima25
    25°C sea temperature

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The September weather guide for Japan (Hiroshima) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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More about Japan

How hot is it in Hiroshima in September?

Daytime temperatures usually reach 27°C in Hiroshima in September with moderate heat and humidity, falling to 19°C at night.

How sunny is it in Hiroshima in September?

There are normally 5 hours of bright sunshine each day in Hiroshima in September - that's 42% of daylight hours.

How warm is the sea around Hiroshima in September?

The average sea temperature around Hiroshima in September is 25°C.

Does it rain in Hiroshima in September?

There are usually 16 days with some rain in Hiroshima in September and the average monthly rainfall is 186mm.

What is the chance of a typhoon in Hiroshima in September?

On average 1.5 days in September in Hiroshima are likely to be affected by the passage of one or more tropical storms.

Hiroshima September sunrise & sunset times

Browse the sunrise and sunset times for Hiroshima in September 2025. Select a month to view Hiroshima sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:43 18:37
Monday, 15th September 2025 05:53 18:17
Tuesday, 30th September 2025 06:04 17:56

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