September weather forecast
Chuen Lung, Hong Kong

The first month of the autumn, September, is also a hot month in Chuen Lung, 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

Chuen Lung's shift from August to September is accompanied by an average high-temperature of a still tropical 30°C (86°F), a slight deviation from 31.3°C (88.3°F). Chuen Lung's nighttime temperature in September experiences a slight dip from daytime highs, falling to an average of 26.3°C (79.3°F).

Heat index

For September, the heat index is appraised at a sweltering 37°C (98.6°F). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', reflects the blend of air temperature and relative humidity to give a temperature impression. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are extremely significant for children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
Through perspiration, the body has a natural mechanism to eliminate excessive heat via sweat evaporation. In conditions of both high temperature and humidity (a high heat index), sweating is limited and the perception of heat is enhanced. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

In September, the average relative humidity in Chuen Lung is 76%.

Rainfall

In Chuen Lung, during September, the rain falls for 19.8 days and regularly aggregates up to 94mm (3.7") of precipitation. In Chuen Lung, Hong Kong, during the entire year, the rain falls for 187.1 days and collects up to 771mm (30.35") 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 06:06 and sunset at 18:40. On the last day of September, in Chuen Lung, sunrise is at 06:14 and sunset at 18:12 HKT.

Sunshine

The average sunshine in September is 8.2h.

UV index

The months with the highest UV index in Chuen Lung are May through September, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: An average maximum UV index of 7 in September leads to these recommendations:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.