Japan weather in May 2025

Expect 23°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Japan in May. Check more long-term weather averages for Japan in May before you book your next holiday to Japan in 2025/2026.

  • 23°C maximum daytime temperature in May in Japan (Tokyo)23
    23°C max day temperature
  • 6 hours of sunshine per day
  • 16 days with some rainfall in May in Japan (Tokyo)16
    16 days with some rainfall
  • 14°C minimum night-time temperature in May in Japan (Tokyo)14
    14°C min night temperature
  • 14 hours of daylight per day in May in Japan (Tokyo)14
    14 hours of daylight per day
  • No heat & humidity in May in Japan (Tokyo)0
    No heat & humidity
  • 132 mm monthly rainfall in May in Japan (Tokyo)132
    132 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in May in Japan (Tokyo)9
    9 (Very High) UV index
  • 18°C sea temperature in May in Japan (Tokyo)18
    18°C sea temperature

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The May 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 May. 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 May?

Daytime temperatures usually reach 23°C in Tokyo, Japan in May, falling to 14°C at night.

How sunny is it in Japan in May?

There are normally 6 hours of bright sunshine each day in Tokyo, Japan in May - that's 42% of daylight hours.

How warm is the sea around Japan in May?

The average sea temperature around Tokyo, Japan in May is 18°C.

Does it rain in Japan in May?

There are usually 16 days with some rain in Tokyo, Japan in May and the average monthly rainfall is 132mm.

Japan May sunrise & sunset times

Browse the sunrise and sunset times for Japan in May 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
Thursday, 1st May 2025 04:49 18:27
Friday, 16th May 2025 04:35 18:40
Saturday, 31st May 2025 04:27 18:51

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