September weather forecast
Aberdeen, Hong Kong

In September, Aberdeen experiences a climate shift hinting at the onset of autumn. The temperature and humidity levels show a decline, yet remain relatively high. Rainfall volume sees a drop, denoting the end of the rainy summer phase. Wind speeds rise, signaling a refreshing change in the weather pattern. With the significant decline in temperature to 29.6°C (85.3°F) and the reduction in rainfall to 155mm (6.1"), September marks the start of Autumn.

Temperature

September's climate shows a minor adjustment in average high-temperatures to a moderately hot 29.6°C (85.3°F) from August's 30.5°C (86.9°F). Aberdeen, during September nights, observes a steady temperature, averaging at 26.5°C (79.7°F).

Heat index

September's mean heat index is computed to be a very hot 36°C (96.8°F). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', shows a temperature sensation when both heat and moisture conditions are combined. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical 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.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it down. An increase in relative humidity retards evaporation, subsequently reducing the body's heat removal rate and leading to a sensation of being overly warm. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.

Humidity

The average relative humidity in September in Aberdeen is 77%.

Rainfall

In Aberdeen, during September, the rain falls for 22.7 days and regularly aggregates up to 155mm (6.1") of precipitation. In Aberdeen, during the entire year, the rain falls for 224.5 days and collects up to 1264mm (49.76") of precipitation.

Daylight

In September, the average length of the day is 12h and 17min.
On the first day of September in Aberdeen, sunrise is at 06:06 and sunset at 18:40. On the last day of the month, sunrise is at 06:14 and sunset at 18:12 HKT.

Sunshine

In September, the average sunshine is 8.4h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in Aberdeen. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for average individuals.
Note: In September, the maximum UV index of 7 suggests this advice:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.