September weather forecast
Hoi Ha, Hong Kong

September, the first month of the autumn in Hoi Ha, is still a hot month, with an average temperature ranging between min 26.3°C (79.3°F) and max 30°C (86°F).

Temperature

Transitioning into September, Hoi Ha records an average high-temperature of a still hot 30°C (86°F), almost identical to August's 31.3°C (88.3°F). Hoi Ha's nighttime temperature in September experiences a slight dip from daytime highs, falling to an average of 26.3°C (79.3°F).

Heat index

The average heat index in September is evaluated at a fiery hot 37°C (98.6°F). Adopt extra safety steps, risk of heat exhaustion and heat cramps is notable. Sustained activity might cause heatstroke.
Factoring in the heat index, values are geared towards shaded areas with light breezes. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', joins air temperature with relative humidity to produce a temperature perception for humans. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.

Humidity

In September, the average relative humidity in Hoi Ha is 76%.

Rainfall

In September, in Hoi Ha, the rain falls for 19.8 days. Throughout September, 94mm (3.7") of precipitation is accumulated. In Hoi Ha, 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 in Hoi Ha, sunrise is at 06:05 and sunset at 18:39. On the last day of the month, sunrise is at 06:13 and sunset at 18:11 HKT.

Sunshine

In September, the average sunshine is 8.2h.

UV index

The months with the highest UV index in Hoi Ha are May through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for average individuals.
Note: A maximum daily UV index of 7 during September morphs into the following directions:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.