Osaka weather in August
August in Osaka: sweltering, soaked, with very humid — a fair time to visit.
#11 of 12 months in Osaka · #499 of 604 destinations to visit in August · comfort 59/100 (tier D)
Updated June 2026 · climate normals from ERA5 reanalysis
Osaka climate normals — August
| Daytime high | 32°C / 89°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 25°C / 77°F | |
| Feels like (high) | 37°C / 99°F | |
| Rainfall | 177 mm / 7 in | ⛈ soaked |
| Rainy days | 13 days | |
| Humidity | 78% | 💦 very humid |
| Dew point | 24°C / 75°F | |
| Sunshine | 9.9 h/day | |
| Daylight | 13.4 h | |
| Wind | 14 km/h / 8 mph | |
| Air quality (US AQI) | 63 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Osaka in August — FAQ
- Is August a good time to visit Osaka?
- August in Osaka: sweltering, soaked, with very humid — a fair time to visit. It ranks #11 of 12 months for Osaka on SeasonMap's comfort score (59/100).
- What is the weather like in Osaka in August?
- In August, Osaka averages a daily high of 31.7°C and a low of 25.2°C, with about 176.7 mm of rain over roughly 13.2 rainy days.
- What is the air quality in Osaka in August?
- Osaka has a mean US Air Quality Index of about 63 in August.