September weather forecast
Wa Mei Shan, Hong Kong

The first month of the autumn, September, is still a tropical month in Wa Mei Shan, Hong Kong, with an average temperature ranging between max 30.1°C (86.2°F) and min 26.3°C (79.3°F).

Temperature

Wa Mei Shan records an average high-temperature of a still tropical 30.1°C (86.2°F) in September, closely mirroring the climate of the previous month. Wa Mei Shan's September nights exhibit a subtle drop in temperature, averaging at a warm 26.3°C (79.3°F), closely aligned with the daytime highs.

Heat index

During September, the heat index is computed to be a sweltering 37°C (98.6°F). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
Heat index data is primarily for areas with shade and subjected to light winds. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', gauges the sensation of temperature factoring in the air's moisture content. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
The human body keeps its cool primarily through perspiration, as this process enables sweat to evaporate, taking away the excess heat. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

The average relative humidity in September is 76%.

Rainfall

In Wa Mei Shan, in September, during 20.7 rainfall days, 101mm (3.98") of precipitation is typically accumulated. Throughout the year, there are 188 rainfall days, and 778mm (30.63") of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 17min.
On the first day of September in Wa Mei Shan, Hong Kong, sunrise is at 06:06 and sunset at 18:40. On the last day of the month, sunrise is at 06:14 and sunset at 18:12 HKT.

Sunshine

In Wa Mei Shan, the average sunshine in September is 8h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: A maximum daily UV index of 7 during September morphs into the following directions:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.