Last updated: March 2, 2024
The weather in Jeju City, South Korea, during September is characterized by an average temperature of 23°C (74°F). Highs can soar to 28°C (82°F), while lows may dip to 19°C (66°F). Typically, the humidity level in Jeju City throughout September hovers around 84%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In September, Jeju City averages 298 mm (11.7 inches) of rainfall, typically over the course of 15 rainy days. The month enjoys an average of 12 hours 20 minutes of daylight, with the sun shining for approximately 8 hours 52 minutes each day. Additionally, there is a 35% probability of sunny days during this period.
Precipitation
Rainy days
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Chance of sun
In September, the UV Index in Jeju City reaches a maximum of 10, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, 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 | 1 | 2 | 4 | 6 | 9 | 10 | 10 | 8 | 6 | 4 | 2 | 1 | 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 | ||||||