Hakone weather in August
August in Hakone: warm, soaked, with clean air — fine if you can take 16 rainy days.
#7 of 12 months in Hakone · #602 of 897 destinations to visit in August · comfort 73/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Hakone in August
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Hakone climate normals — August
| Daytime high | 26°C / 79°F | 🌤 warm |
|---|---|---|
| Nighttime low | 21°C / 69°F | |
| Rainfall | 203 mm / 8 in | ⛈ soaked |
| Rainy days | 16 days | |
| Humidity | 87% | 💦 very humid |
| Dew point | 21°C / 69°F | |
| Sunshine | 10.1 h/day | |
| Daylight | 13.4 h | |
| Wind | 11 km/h / 7 mph | |
| Air quality (US AQI) | 41 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Hakone in August — FAQ
- Is August a good time to visit Hakone?
- August in Hakone: warm, soaked, with clean air — fine if you can take 16 rainy days. It ranks #7 of 12 months for Hakone on SeasonMap's comfort score (73/100).
- What is the weather like in Hakone in August?
- In August, Hakone averages a daily high of 26.2°C and a low of 20.5°C, with about 202.8 mm of rain over roughly 16.4 rainy days.
- What is the air quality in Hakone in August?
- Hakone has a mean US Air Quality Index of about 41 in August.