September weather forecast
Nam Chung Cheng Uk, Hong Kong

The first month of the autumn, September, is still a hot month in Nam Chung Cheng Uk, Hong Kong, with temperature in the range of an average high of 30°C (86°F) and an average low of 26.3°C (79.3°F).

Temperature

As September unfolds, the average high-temperature reaches a still tropical 30°C (86°F), hinting at a slight fluctuation from the previous month. During the month of September, Nam Chung Cheng Uk's average nighttime temperature closely mirrors its daytime counterpart, at a moderately hot 26.3°C (79.3°F).

Heat index

Throughout September, the heat index is calculated to be a torrid 37°C (98.6°F). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.
When referencing the heat index, its values are suitable for shady environments and light breezes. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', gives a temperature feeling by integrating air temperature and humidity. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. 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 extremely significant for babies and toddlers. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
The body's innate mechanism to counteract overheating is through perspiration, as it leverages the cooling effects of sweat evaporation. Relative humidity in excess curtails evaporation, therefore reducing heat dissipation from the body, leading to feelings of excess heat. Rising body temperatures due to excess heat retention could signify impending heat disorders.

Humidity

In September, the average relative humidity is 76%.

Rainfall

In Nam Chung Cheng Uk, during September, the rain falls for 19.8 days and regularly aggregates up to 94mm (3.7") of precipitation. In Nam Chung Cheng Uk, during the entire year, the rain falls for 187.1 days and collects up to 771mm (30.35") of precipitation.

Daylight

In Nam Chung Cheng Uk, the average length of the day in September is 12h and 17min.
On the first day of September, sunrise is at 06:05 and sunset at 18:40. On the last day of the month, sunrise is at 06:14 and sunset at 18:11 HKT.

Sunshine

In Nam Chung Cheng Uk, the average sunshine in September 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 value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: In September, an average UV index of 7 transforms into the following instructions:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.