September weather forecast
Lin Ma Hang, Hong Kong

September, the first month of the autumn in Lin Ma Hang, is still a tropical month, with an average temperature fluctuating between 30.5°C (86.9°F) and 25.9°C (78.6°F).

Temperature

August's transformation into September witnesses an average high-temperature of a still tropical 30.5°C (86.9°F), noting a minor change from the preceding month. During September, Lin Ma Hang's nighttime temperatures demonstrate a subtle cooling from daytime highs, stabilizing at a warm 25.9°C (78.6°F).

Heat index

The heat index value for September is appraised at a very hot 38°C (100.4°F). Ensure extra safety steps, heat exhaustion and heat cramps are likely. Long activity might lead to heatstroke.
Heat index's context suggests values are appropriate for shady areas and slight breezes. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', marries air temperature and humidity to produce a value illustrating perceived warmth. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
The process of perspiration is vital for the human body to get rid of excess warmth by allowing sweat to evaporate. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.

Humidity

The average relative humidity in September is 75%.

Rainfall

In Lin Ma Hang, during September, the rain falls for 17.9 days and regularly aggregates up to 66mm (2.6") of precipitation. Throughout the year, there are 164.9 rainfall days, and 548mm (21.57") of precipitation is accumulated.

Daylight

In Lin Ma Hang, the average length of the day in September 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

In Lin Ma Hang, the average sunshine in September is 8.1h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: In September, a regular UV index of 7 translates into these guidelines:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.