September weather forecast
Sai Tso Wan, Hong Kong

The first month of the autumn, September, is still a tropical month in Sai Tso Wan, Hong Kong, with an average temperature fluctuating between 26.4°C (79.5°F) and 30°C (86°F).

Temperature

Sai Tso Wan experiences an average high-temperature of a still hot 30°C (86°F) in September, marking an insignificant shift from 31.3°C (88.3°F) in August. During the September nights, Sai Tso Wan's temperature maintains an average close to the daytime highs, settling at a warm 26.4°C (79.5°F).

Heat index

The heat index in September is calculated to be a fiery hot 37°C (98.6°F). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
Research indicates the heat index considers values in shaded locales and with light winds. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a metric representing the sensation of warmth when air temperature and moisture come together. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
Evaporating sweat, thanks to perspiration, acts as a natural air conditioner for the human body. An increase in relative humidity disrupts body cooling by slowing the evaporation rate, thereby reducing the rate at which the body cools and amplifying the sense of heat. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.

Humidity

In Sai Tso Wan, Hong Kong, the average relative humidity in September is 76%.

Rainfall

In Sai Tso Wan, in September, during 22.7 rainfall days, 150mm (5.91") of precipitation is typically accumulated. In Sai Tso Wan, during the entire year, the rain falls for 207.6 days and collects up to 1194mm (47.01") of precipitation.

Daylight

The average length of the day in September in Sai Tso Wan, Hong Kong, is 12h and 17min.
On the first day of the month, sunrise is at 06:05 and sunset at 18:40. On the last day of September, sunrise is at 06:14 and sunset at 18:11 HKT.

Sunshine

The average sunshine in September in Sai Tso Wan is 8.2h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: In September, the maximum UV index of 7 transforms into these recommendations:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Boost your sun resistance with garments that are densely woven yet spacious.