September weather forecast
Lai Chi Wo, Hong Kong

The first month of the autumn, September, is also a hot month in Lai Chi Wo, Hong Kong, with temperature in the range of an average low of 26.3°C (79.3°F) and an average high of 30°C (86°F).

Temperature

September brings a marginal elevation to a still tropical 30°C (86°F) from August's 31.3°C (88.3°F) in Lai Chi Wo's average high-temperatures. Lai Chi Wo's nighttime temperatures in September display a slight drop from daytime highs, averaging to a moderately hot 26.3°C (79.3°F).

Heat index

September's mean heat index is evaluated at a torrid 37°C (98.6°F). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.
Research indicates the heat index considers values in shaded locales and with light winds. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', evaluates the perceived heat by adding the effect of moisture in the air. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. 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 are primarily vital for children. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.

Humidity

The average relative humidity in September in Lai Chi Wo is 76%.

Rainfall

In Lai Chi Wo, in September, during 19.8 rainfall days, 94mm (3.7") of precipitation is typically accumulated. Throughout the year, in Lai Chi Wo, Hong Kong, there are 187.1 rainfall days, and 771mm (30.35") of precipitation is accumulated.

Daylight

In September, the average length of the day in Lai Chi Wo 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 Lai Chi Wo, the average sunshine in September is 8.2h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in Lai Chi Wo. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the average person.
Note: In September, the UV index of 7 transforms into the following advice:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.