September weather forecast
Fui Sha Wai, Hong Kong

The first month of the autumn, September, is still a hot month in Fui Sha Wai, Hong Kong, with an average temperature fluctuating between 26.4°C (79.5°F) and 30°C (86°F).

Temperature

The onset of September manifests an average high-temperature of a still hot 30°C (86°F), demonstrating a minor variation from the preceding month. Fui Sha Wai navigates through September with a barely noticeable decrease in temperature at night, stabilizing at a warm 26.4°C (79.5°F).

Heat index

The heat index value for September is evaluated at a sweltering 37°C (98.6°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Understand that the heat index values take into account shaded locations and mild 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 composite of temperature and humidity figures to convey how warm it feels. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

In September, the average relative humidity is 76%.

Rainfall

In Fui Sha Wai, during September, the rain falls for 22.7 days and regularly aggregates up to 150mm (5.91") of precipitation. Throughout the year, in Fui Sha Wai, there are 207.6 rainfall days, and 1194mm (47.01") of precipitation is accumulated.

Daylight

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

Sunshine

In September, the average sunshine in Fui Sha Wai, Hong Kong, is 8.2h.

UV index

The months with the highest UV index in Fui Sha Wai are May through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the average person.
Note: A maximum high daily UV index of 7 during September translates into the following directions:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays.