Osaka weather in August 2025

Expect 91°F daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Osaka in August. Check more long-term weather averages for Osaka in August before you book your next holiday to Japan in 2025/2026.

  • 91°F maximum daytime temperature in August in Osaka91
    91°F max day temperature
  • 7 hours of sunshine per day
  • 16 days with some rainfall in August in Osaka16
    16 days with some rainfall
  • 77°F minimum night-time temperature in August in Osaka77
    77°F min night temperature
  • 13 hours of daylight per day in August in Osaka13
    13 hours of daylight per day
  • Very high heat & humidity in August in OsakaVH
    Very High heat & humidity
  • 4.2 inches monthly rainfall in August in Osaka4.2
    4.2 inches of monthly rainfall
  • UV (maximum) index 10 (Very High) in August in Osaka10
    10 (Very High) UV index
  • 81°F sea temperature in August in Osaka81
    81°F sea temperature

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The August weather guide for Japan (Osaka) 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)  |  Imperial (°F)

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More about Japan

How hot is it in Osaka in August?

Daytime temperatures usually reach 91°F in Osaka in August with very high heat and humidity, falling to 77°F at night.

How sunny is it in Osaka in August?

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

How warm is the sea around Osaka in August?

The average sea temperature around Osaka in August is 81°F.

Does it rain in Osaka in August?

There are usually 16 days with some rain in Osaka in August and the average monthly rainfall is 4.2 inches.

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

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

Osaka August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:08 19:00
Saturday, 16th August 2025 05:19 18:45
Sunday, 31st August 2025 05:30 18:26

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