Koya weather in August 2025

Expect 29°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Koya in August. Check more long-term weather averages for Koya in August before you book your next holiday to Japan in 2025/2026.

  • 29°C maximum daytime temperature in August in Koya29
    29°C max day temperature
  • 6 hours of sunshine per day
  • 17 days with some rainfall in August in Koya17
    17 days with some rainfall
  • 21°C minimum night-time temperature in August in Koya21
    21°C min night temperature
  • 13 hours of daylight per day in August in Koya13
    13 hours of daylight per day
  • Moderate heat & humidity in August in KoyaM
    Moderate heat & humidity
  • 211 mm monthly rainfall in August in Koya211
    211 mm of monthly rainfall
  • UV (maximum) index 10 (Very High) in August in Koya10
    10 (Very High) UV index

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The August weather guide for Japan (Koya) 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 Koya in August?

Daytime temperatures usually reach 29°C in Koya in August with moderate heat and humidity, falling to 21°C at night.

How sunny is it in Koya in August?

There are normally 6 hours of bright sunshine each day in Koya in August - that's 46% of daylight hours.

Does it rain in Koya in August?

There are usually 17 days with some rain in Koya in August and the average monthly rainfall is 211mm.

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

On average 1.7 days in August in Koya are likely to be affected by the passage of one or more tropical storms.

Koya August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:08 18:59
Saturday, 16th August 2025 05:19 18:44
Sunday, 31st August 2025 05:30 18:25

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