Last updated: March 2, 2024
The weather in Ondong Siau, Indonesia, during September is characterized by an average temperature of 27°C (82°F). Highs can soar to 29°C (84°F), while lows may dip to 26°C (78°F). Typically, the humidity level in Ondong Siau throughout September hovers around 77%.
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Average temperature
Maximum temperature
Humidity
In September, Ondong Siau averages 170 mm (6.7 inches) of rainfall, typically over the course of 19 rainy days. The month enjoys an average of 12 hours 6 minutes of daylight, with the sun shining for approximately 9 hours 50 minutes each day. Additionally, there is a 18% probability of sunny days during this period.
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In September, the UV Index in Ondong Siau reaches a maximum of 14, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 11:00 and 13:00, 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 | 2 | 5 | 8 | 12 | 14 | 14 | 12 | 8 | 4 | 2 | 1 | 0 | 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 | ||||||