Japan weather in August 2025

Expect 31°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Japan in August. Check more long-term weather averages for Japan in August before you book your next holiday to Japan in 2025/2026.

  • 31°C maximum daytime temperature in August in Japan (Tokyo)31
    31°C max day temperature
  • 6 hours of sunshine per day
  • 16 days with some rainfall in August in Japan (Tokyo)16
    16 days with some rainfall
  • 24°C minimum night-time temperature in August in Japan (Tokyo)24
    24°C min night temperature
  • 13 hours of daylight per day in August in Japan (Tokyo)13
    13 hours of daylight per day
  • High heat & humidity in August in Japan (Tokyo)H
    High heat & humidity
  • 147 mm monthly rainfall in August in Japan (Tokyo)147
    147 mm of monthly rainfall
  • UV (maximum) index 10 (Very High) in August in Japan (Tokyo)10
    10 (Very High) UV index
  • 26°C sea temperature in August in Japan (Tokyo)26
    26°C sea temperature

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The August weather guide for Japan (Tokyo) 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.

Top Japan destinations

Below are average maximum temperatures at popular countries, regions and places in Japan in August. Select a holiday destination to see more weather parameters.

All Japan destinations

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

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More about Japan

How hot is it in Japan in August?

Daytime temperatures usually reach 31°C in Tokyo, Japan in August with high heat and humidity, falling to 24°C at night.

How sunny is it in Japan in August?

There are normally 6 hours of bright sunshine each day in Tokyo, Japan in August - that's 43% of daylight hours.

How warm is the sea around Japan in August?

The average sea temperature around Tokyo, Japan in August is 26°C.

Does it rain in Japan in August?

There are usually 16 days with some rain in Tokyo, Japan in August and the average monthly rainfall is 147mm.

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

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

Japan August sunrise & sunset times

Browse the sunrise and sunset times for Japan in August 2025. Select a month to view Japan sunrise and sunset times for the next 12 months. The Japan sunrise and sunset times shown below are for Tokyo.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 04:49 18:45
Saturday, 16th August 2025 05:00 18:29
Sunday, 31st August 2025 05:12 18:10

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