Last updated: March 2, 2024
The weather in Hachijo, Japan, during September is characterized by an average temperature of 27°C (80°F). Highs can soar to 29°C (84°F), while lows may dip to 23°C (74°F). Typically, the humidity level in Hachijo throughout September hovers around 82%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In September, Hachijo averages 311 mm (12.3 inches) of rainfall, typically over the course of 19 rainy days. The month enjoys an average of 12 hours 21 minutes of daylight, with the sun shining for approximately 8 hours 54 minutes each day. Additionally, there is a 34% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In September, the UV Index in Hachijo reaches a maximum of 10, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 11:00 and 13:00, during which unprotected skin may burn in as little as 15 minutes.
| 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UVI | 2 | 3 | 6 | 8 | 10 | 10 | 9 | 6 | 4 | 2 | 1 | 0 | 0 |
| Exposure | Low | Moderate | High | VeryHigh | High | Moderate | Low | ||||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 25 min | 30 min | 45 min | ||||||