September weather forecast
Siu Chik Sha, Hong Kong

The first month of the autumn, September, is also a moderately hot month in Siu Chik Sha, Hong Kong, with an average temperature fluctuating between 26.5°C (79.7°F) and 29.6°C (85.3°F).

Temperature

The arrival of September brings an average high-temperature of a warm 29.6°C (85.3°F), subtly diverging from August's 30.5°C (86.9°F). Siu Chik Sha's nocturnal average in September closely mirrors its daytime temperatures, settling at a still moderately hot 26.5°C (79.7°F).

Heat index

The heat index for September is evaluated at a fiery hot 36°C (96.8°F). Extra precautions are necessary, heat cramps and heat exhaustion are plausible outcomes. Extended activity could lead to heatstroke.
Always consider that heat index estimations are for light winds and places in the shade. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
The process of perspiration is vital for the human body to get rid of excess warmth by allowing sweat to evaporate. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

In Siu Chik Sha, the average relative humidity in September is 77%.

Rainfall

In September, in Siu Chik Sha, the rain falls for 22.7 days. Throughout September, 155mm (6.1") of precipitation is accumulated. In Siu Chik Sha, during the entire year, the rain falls for 224.5 days and collects up to 1264mm (49.76") of precipitation.

Daylight

In September, the average length of the day is 12h and 17min.
On the first day of the month, sunrise is at 06:05 and sunset at 18:39. On the last day of September, sunrise is at 06:14 and sunset at 18:11 HKT.

Sunshine

In Siu Chik Sha, Hong Kong, the average sunshine in September is 8.4h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in Siu Chik Sha. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the average person.
Note: In September, a regular UV index of 7 translates into these guidelines:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.