Niigata weather in August 2025

Expect 31°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Niigata in August. Check more long-term weather averages for Niigata in August before you book your next holiday to Japan in 2025/2026.

  • 31°C maximum daytime temperature in August in Niigata31
    31°C max day temperature
  • 7 hours of sunshine per day
  • 16 days with some rainfall in August in Niigata16
    16 days with some rainfall
  • 23°C minimum night-time temperature in August in Niigata23
    23°C min night temperature
  • 14 hours of daylight per day in August in Niigata14
    14 hours of daylight per day
  • High heat & humidity in August in NiigataH
    High heat & humidity
  • 135 mm monthly rainfall in August in Niigata135
    135 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in August in Niigata9
    9 (Very High) UV index
  • 26°C sea temperature in August in Niigata26
    26°C sea temperature

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The August 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 August?

Daytime temperatures usually reach 31°C in Niigata in August with high heat and humidity, falling to 23°C at night.

How sunny is it in Niigata in August?

There are normally 7 hours of bright sunshine each day in Niigata in August - that's 48% of daylight hours.

How warm is the sea around Niigata in August?

The average sea temperature around Niigata in August is 26°C.

Does it rain in Niigata in August?

There are usually 16 days with some rain in Niigata in August and the average monthly rainfall is 135mm.

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

On average 1.6 days in August in Niigata are likely to be affected by the passage of one or more tropical storms.

Niigata August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 04:47 18:53
Saturday, 16th August 2025 05:00 18:36
Sunday, 31st August 2025 05:13 18:15

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