Hiroshima weather in August 2025

Expect 31°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Hiroshima in August. Check more long-term weather averages for Hiroshima in August before you book your next holiday to Japan in 2025/2026.

  • 31°C maximum daytime temperature in August in Hiroshima31
    31°C max day temperature
  • 7 hours of sunshine per day
  • 14 days with some rainfall in August in Hiroshima14
    14 days with some rainfall
  • 23°C minimum night-time temperature in August in Hiroshima23
    23°C min night temperature
  • 13 hours of daylight per day in August in Hiroshima13
    13 hours of daylight per day
  • Very high heat & humidity in August in HiroshimaVH
    Very High heat & humidity
  • 125 mm monthly rainfall in August in Hiroshima125
    125 mm of monthly rainfall
  • UV (maximum) index 10 (Very High) in August in Hiroshima10
    10 (Very High) UV index
  • 26°C sea temperature in August in Hiroshima26
    26°C sea temperature

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The August 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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How hot is it in Hiroshima in August?

Daytime temperatures usually reach 31°C in Hiroshima in August with very high heat and humidity, falling to 23°C at night.

How sunny is it in Hiroshima in August?

There are normally 7 hours of bright sunshine each day in Hiroshima in August - that's 51% of daylight hours.

How warm is the sea around Hiroshima in August?

The average sea temperature around Hiroshima in August is 26°C.

Does it rain in Hiroshima in August?

There are usually 14 days with some rain in Hiroshima in August and the average monthly rainfall is 125mm.

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

On average 1.8 days in August in Hiroshima are likely to be affected by the passage of one or more tropical storms.

Hiroshima August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:21 19:12
Saturday, 16th August 2025 05:32 18:57
Sunday, 31st August 2025 05:43 18:38

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