Japan weather in September 2025

Expect 27°C daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in Japan in September. Check more long-term weather averages for Japan in September before you book your next holiday to Japan in 2025/2026.

  • 27°C maximum daytime temperature in September in Japan (Tokyo)27
    27°C max day temperature
  • 4 hours of sunshine per day
  • 19 days with some rainfall in September in Japan (Tokyo)19
    19 days with some rainfall
  • 20°C minimum night-time temperature in September in Japan (Tokyo)20
    20°C min night temperature
  • 12 hours of daylight per day in September in Japan (Tokyo)12
    12 hours of daylight per day
  • Low heat & humidity in September in Japan (Tokyo)L
    Low heat & humidity
  • 181 mm monthly rainfall in September in Japan (Tokyo)181
    181 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in September in Japan (Tokyo)8
    8 (Very High) UV index
  • 25°C sea temperature in September in Japan (Tokyo)25
    25°C sea temperature

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The September 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 September. 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 September?

Daytime temperatures usually reach 27°C in Tokyo, Japan in September with low heat and humidity, falling to 20°C at night.

How sunny is it in Japan in September?

There are normally 4 hours of bright sunshine each day in Tokyo, Japan in September - that's 31% of daylight hours.

How warm is the sea around Japan in September?

The average sea temperature around Tokyo, Japan in September is 25°C.

Does it rain in Japan in September?

There are usually 19 days with some rain in Tokyo, Japan in September and the average monthly rainfall is 181mm.

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

On average 1.4 days in September in Tokyo, Japan are likely to be affected by the passage of one or more tropical storms.

Japan September sunrise & sunset times

Browse the sunrise and sunset times for Japan in September 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
Monday, 1st September 2025 05:13 18:09
Monday, 15th September 2025 05:23 17:48
Tuesday, 30th September 2025 05:35 17:26

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