September weather forecast
Fung Hang, Hong Kong

The first month of the autumn, September, is still a tropical month in Fung Hang, Hong Kong, with an average temperature ranging between max 30°C (86°F) and min 26.3°C (79.3°F).

Temperature

Fung Hang marks the arrival of September with an average high-temperature of a still tropical 30°C (86°F), hardly different from August's 31.3°C (88.3°F). Fung Hang marks an average drop to a moderately hot 26.3°C (79.3°F) during nighttime in September, following the high of the day.

Heat index

During September, the heat index is estimated at a fiery hot 37°C (98.6°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Heat index guidelines indicate values are for light wind scenarios and shaded regions. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
In the face of high temperatures, the human body's reflex is to perspire, leveraging sweat evaporation for cooling. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

The average relative humidity in September is 76%.

Rainfall

In Fung Hang, during September, the rain falls for 19.8 days and regularly aggregates up to 94mm (3.7") of precipitation. In Fung Hang, 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 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

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 reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: A daily high UV index of 7 in September leads to these guidelines:
Stay clear of intense sun exposure. Solar protection is of utmost significance. 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. During bright days, sunglasses that offer UVA and UVB defense are recommended.