September weather forecast
Lan Nai Wan, Hong Kong

The first month of the autumn, September, is still a warm month in Lan Nai Wan, Hong Kong, with an average temperature ranging between min 26.5°C (79.7°F) and max 29.6°C (85.3°F).

Temperature

Transitioning into September, Lan Nai Wan experiences an average high-temperature of a warm 29.6°C (85.3°F), marking a minor shift from the preceding month. The temperature in Lan Nai Wan during September experiences a small drop from daytime peaks, recording an average of 26.5°C (79.7°F) at night.

Heat index

In September, the heat index is computed to be a torrid 36°C (96.8°F). Incorporate extra safety measures to avoid heat exhaustion and heat cramps. Continuous activity could provoke heatstroke.
Heat index data is primarily for areas with shade and subjected to light winds. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
By perspiring, the human body can shed its excessive warmth since evaporated sweat cools it off. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

In September, the average relative humidity is 77%.

Rainfall

In Lan Nai Wan, Hong Kong, in September, during 22.7 rainfall days, 155mm (6.1") of precipitation is typically accumulated. In Lan Nai Wan, Hong Kong, during the entire year, the rain falls for 224.5 days and collects up to 1264mm (49.76") of precipitation.

Daylight

The average length of the day in September in Lan Nai Wan is 12h and 17min.
On the first day of September in Lan Nai Wan, 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 September, the average sunshine is 8.4h.

UV index

The months with the highest UV index in Lan Nai Wan, Hong Kong, are May through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: In September, an average UV index of 7 transforms into the following instructions:
Fend off overexposure. Sun protection is vital. 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. Tightly woven clothing, when worn loosely, shields effectively against the Sun.