Weather in Osaka in August 2025
- August is usually the hottest month of the year in Osaka;
Average weather
Average temperature in Osaka in August
The expected average maximum temperature in August is +32°C with a maximum of +35°C and a minimum of +23°C.
The average maximum temperature goes down 42% by the end of the month, compared with the beginning of the month, from +34°C to +29°C.
Is Osaka warm or cold in August?
Osaka is typically warm in August.
Maximum temperatures go up compared to the previous month from +29°C to +30°C. The minimum temperature also goes up from +22°C to +23°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
August is the hottest month in Osaka, here is the comparison with other months:
Climate in Osaka in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +29°C | +30°C | +26°C | ||||
| Min. temperature | ||||||
| +14°C | +15°C | +8°C | ||||
| Max. temperature | ||||||
| +36°C | +37°C | +34°C | ||||
| Rainfall | ||||||
| 222 mm | 147 mm | 200 mm | ||||
| Wind | ||||||
| 1 m/s | 1 m/s | 2 m/s | ||||
| Humidity | ||||||
| 80% | 77% | 77% | ||||
| Air pressure | ||||||
| 1008 HPa | 1009 HPa | 1012 HPa | ||||
| Sunny days | ||||||
| 1 | 3 | 3 | ||||
| Cloudy days | ||||||
| 6 | 7 | 9 | ||||
| Rainy days | ||||||
| 24 | 22 | 18 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as ok as in July. It’s getting warmer as August arrives. The average maximum temperature goes up from +29°C to +30°C during the day. As August arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 222 mm to 147 mm. It feels drier, as humidity decreases from 80% to 77%. The average wind speed doesn’t change much during August, staying around 1 m/s. The good news is there are likely to be more sunny days in August, from 1 to 3.
September brings much the same weather, it remains ok.
Wind
The average wind speed is 2 m/s getting up to 6 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Osaka is gradually increasing during August, going from 2 m/s to 2 m/s over the course of the month.
Rain
How was the weather last August in Osaka?
Climate Change over Years
The climate in Osaka in August has not changed much over the last 43 years.
The average temperature was the lowest in 1980 (+17°C) and the highest in 2023 (+20°C). The driest year was 1994 with only 846 mm of rainfall, and the wettest year was 1993 with 1901 mm.
FAQ
Is August a good time to visit Osaka?
Can you sunbathe in Osaka in August?
Is Osaka rainy in August?
Is it sunny in Osaka in August?
Other cities in Japan
Monthly weather in Osaka
Source of the data
For this page, we’ve looked at the typical weather in Osaka, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.