Osaka Weather in August
Japan · Humid Subtropical climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
August in Osaka sees average temperatures ranging from a low of 25.7°C (78.3°F) to a high of 33.0°C (91.4°F), with a mean of 29.0°C (84.2°F). Compared to the annual average of 16.5°C (61.7°F), this month is 12.5°C warmer than the yearly norm. This is the hottest month of the year, reaching 33.0°C (91.4°F) on average. Precipitation averages 187.8mm, making it approximately 35.0mm wetter than the monthly average of 153.0mm. The city receives an average of 10.4 hours of sunshine per day during August, with relative humidity averaging 74.5%. Wind speeds reach an average maximum of 24.1 km/h. For travelers, this month offers a hottest month of the year experience in Osaka, with wetter-than-average conditions compared to the rest of the year.
Osaka's climate is similar to Tokyo but with a more pronounced urban heat effect. I visited during the humid summer and found the city's famous street food culture actually thrives in the heat — the covered arcades of Dotonbori provide perfect shelter from the sun. The data shows Osaka gets slightly warmer than Tokyo in summer, making air conditioning essential. Spring and autumn are the ideal windows for exploring the city's many temples and castles.
August vs Adjacent Months
| Metric | July | August | September |
|---|---|---|---|
| Mean Temp | 27.2°C (81.0°F) | 29.0°C (84.2°F) | 25.9°C (78.6°F) |
| Rainfall | 274.2mm | 187.8mm | 190.0mm |
| Sunshine | 9.4 hrs | 10.4 hrs | 9.2 hrs |
| Humidity | 79.6% | 74.5% | 75.7% |
| Wind | 24.5 km/h | 24.1 km/h | 21.2 km/h |
| Rainy Days | 22.2 | 19.8 | 19.2 |
Seasonal Context
August falls in Summer in the Northern Hemisphere. Summer brings the warmest conditions of the year with the longest daylight hours. For travelers visiting Osaka in August, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Osaka in August?
The average temperature in Osaka during August ranges from 25.7°C (78.3°F) to 33.0°C (91.4°F), with a mean of 29.0°C (84.2°F).
How much does it rain in Osaka in August?
Osaka receives an average of 187.8mm of precipitation in August, spread across approximately 19.8 rainy days.
What should I pack for Osaka in August?
Based on August weather data, pack lightweight, breathable clothing, sunscreen, and a hat. Rain gear is essential — this month averages 187.8mm of precipitation.
Is August a good time to visit Osaka?
August is a month with challenging conditions. Plan activities carefully and stay hydrated.
Other Months for Osaka
Cities with Similar August Climate (Humid Subtropical)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 34.69°, 135.5°. Timezone: Asia/Tokyo. Last updated: 2026-07-30.