September weather forecast
Orchid Island, Taiwan

In September, the weather undergoes a gradual transition towards cooler conditions. Despite the onset of autumn, a high rainfall volume of 384mm (15.12") persists, distinguishing this month as the rainiest period. The sea temperatures start to decline gradually, indicating the approach of winter. The hours of sunshine begin to reduce as the daylight hours shorten. The UV index drops to 11, but caution against overexposure to the sun is still urged.

Temperature

As September unfolds, the average high-temperature reaches a still moderately hot 28°C (82.4°F), hinting at a slight fluctuation from the previous month. A modest dip in temperatures to an average of 24°C (75.2°F) is observed throughout Orchid Island's September nights.

Rainfall

The month with the most rainfall in Orchid Island is September, when the rain falls for 20 days and typically aggregates up to 384mm (15.12") of precipitation.

Sea temperature

The months with the warmest seawater are June through September, with an average sea temperature of 29°C (84.2°F).
Note: Water temperatures between 25°C (77°F) and 29°C (84.2°F) are regarded as very warm, ensuring all water activities are pleasurable for extended periods without feeling uneasy.

Daylight

The average length of the day in September is 12h and 17min.
On the first day of the month, sunrise is at 05:36 and sunset at 18:10. On the last day of September, sunrise is at 05:44 and sunset at 17:42 CST.

Sunshine

In September, the average sunshine is 5h.

UV index

The average daily maximum UV index in September is 11. A UV Index estimate of 11, and higher, represents an ultimate health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum UV index of 11 in September translates into the following recommendations:
Adopt all important safety measures, unprotected skin may burn rapidly. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Despite the cloudy weather, sunscreen with a sun protection factor of at least 30 should be liberally applied and reapplied, including after a swim or outdoor activity. Take heed! Reflections of sand and water make the Sun's UV rays stronger.