Last updated: March 2, 2024
The weather in Seiyo, Japan, during September is characterized by an average temperature of 23°C (74°F). Highs can soar to 32°C (90°F), while lows may dip to 14°C (57°F). Typically, the humidity level in Seiyo throughout September hovers around 85%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In September, Seiyo averages 229 mm (9.0 inches) of rainfall, typically over the course of 16 rainy days. The month enjoys an average of 12 hours 20 minutes of daylight, with the sun shining for approximately 8 hours 57 minutes each day. Additionally, there is a 28% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In September, the UV Index in Seiyo reaches a maximum of 11, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 10 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 | 1 | 3 | 5 | 8 | 10 | 11 | 10 | 8 | 5 | 3 | 1 | 1 | 0 |
| Exposure | Low | Moderate | VeryHigh | Extreme | VeryHigh | Moderate | Low | ||||||
| Time to burn | 45 min | 30 min | 15 min | 10 min | 15 min | 30 min | 45 min | ||||||