Niigata weather in September 2025

Expect 26°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Niigata in September. Check more long-term weather averages for Niigata in September before you book your next holiday to Japan in 2025/2026.

  • 26°C maximum daytime temperature in September in Niigata26
    26°C max day temperature
  • 5 hours of sunshine per day
  • 19 days with some rainfall in September in Niigata19
    19 days with some rainfall
  • 18°C minimum night-time temperature in September in Niigata18
    18°C min night temperature
  • 12 hours of daylight per day in September in Niigata12
    12 hours of daylight per day
  • Low heat & humidity in September in NiigataL
    Low heat & humidity
  • 158 mm monthly rainfall in September in Niigata158
    158 mm of monthly rainfall
  • UV (maximum) index 7 (High) in September in Niigata7
    7 (High) UV index
  • 25°C sea temperature in September in Niigata25
    25°C sea temperature

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

Daytime temperatures usually reach 26°C in Niigata in September with low heat and humidity, falling to 18°C at night.

How sunny is it in Niigata in September?

There are normally 5 hours of bright sunshine each day in Niigata in September - that's 37% of daylight hours.

How warm is the sea around Niigata in September?

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

Does it rain in Niigata in September?

There are usually 19 days with some rain in Niigata in September and the average monthly rainfall is 158mm.

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

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

Niigata September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:13 18:14
Monday, 15th September 2025 05:25 17:52
Tuesday, 30th September 2025 05:38 17:29

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