September weather forecast
Ngong Ping, Hong Kong

September brings a noticeable shift in the weather in Ngong Ping, Hong Kong. Temperatures descend from 30°C (86°F) to 26.4°C (79.5°F), bringing much-needed relief from the scorching summer heat. A slight decrease in relative humidity to 76% is felt, indicating the beginning of the transition period into autumn. Daylight drops to 12.3 hours, marking the approach of shorter days. September is a transition month, characterized by the onset of milder temperatures and reduced humidity.

Temperature

The transition from August to September brings an average high-temperature of a still tropical 30°C (86°F), barely different from August's 31.3°C (88.3°F). During September, Ngong Ping's nighttime temperatures demonstrate a subtle cooling from daytime highs, stabilizing at a warm 26.4°C (79.5°F).

Heat index

In September, the average heat index is calculated to be a fiery hot 37°C (98.6°F). Undertake extra safety actions, heat cramps and heat exhaustion are expected. Heatstroke may result from lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', gives an indication of how one might feel in terms of heat after considering humidity. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

In September, the average relative humidity is 76%.

Rainfall

In Ngong Ping, in September, it is raining for 22.7 days, with typically 150mm (5.91") of accumulated precipitation. In Ngong Ping, during the entire year, the rain falls for 207.6 days and collects up to 1194mm (47.01") of precipitation.

Daylight

In September, the average length of the day is 12h and 17min.
On the first day of September in Ngong Ping, sunrise is at 06:07 and sunset at 18:41. On the last day of the month, sunrise is at 06:15 and sunset at 18:13 HKT.

Sunshine

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 Ngong Ping. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for average individuals.
Note: In September, a daily maximum UV index of 7 leads to the following instructions:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.