Yokohama weather in September 2025

Expect 26°C daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in Yokohama in September. Check more long-term weather averages for Yokohama in September before you book your next holiday to Japan in 2025/2026.

  • 26°C maximum daytime temperature in September in Yokohama26
    26°C max day temperature
  • 4 hours of sunshine per day
  • 19 days with some rainfall in September in Yokohama19
    19 days with some rainfall
  • 20°C minimum night-time temperature in September in Yokohama20
    20°C min night temperature
  • 12 hours of daylight per day in September in Yokohama12
    12 hours of daylight per day
  • Low heat & humidity in September in YokohamaL
    Low heat & humidity
  • 238 mm monthly rainfall in September in Yokohama238
    238 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in September in Yokohama8
    8 (Very High) UV index
  • 25°C sea temperature in September in Yokohama25
    25°C sea temperature

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The September weather guide for Japan (Yokohama) 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 Yokohama in September?

Daytime temperatures usually reach 26°C in Yokohama in September with low heat and humidity, falling to 20°C at night.

How sunny is it in Yokohama in September?

There are normally 4 hours of bright sunshine each day in Yokohama in September - that's 33% of daylight hours.

How warm is the sea around Yokohama in September?

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

Does it rain in Yokohama in September?

There are usually 19 days with some rain in Yokohama in September and the average monthly rainfall is 238mm.

Yokohama September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:13 18:09
Monday, 15th September 2025 05:24 17:49
Tuesday, 30th September 2025 05:35 17:27

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