September weather forecast
Choi Hung, Hong Kong

The first month of the autumn, September, is still a warm month in Choi Hung, Hong Kong, with an average temperature ranging between max 29.6°C (85.3°F) and min 26.5°C (79.7°F).

Temperature

Choi Hung's shift into September is marked by a subtle change to a moderately hot 29.6°C (85.3°F) from August's 30.5°C (86.9°F) in temperature. Choi Hung registers a small shift from peak daytime temperatures, with a consistent average low-temperature of 26.5°C (79.7°F) during September.

Heat index

The heat index for September is computed to be a torrid 36°C (96.8°F). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
One should be cognizant that the heat index values are tailored for shaded spots and mild winds. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', gives an indication of how one might feel in terms of heat after considering humidity. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Evaporating sweat, an outcome of perspiration, is key in assisting the human body to moderate its temperature. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

The average relative humidity in September is 77%.

Rainfall

In Choi Hung, in September, it is raining for 22.7 days, with typically 155mm (6.1") of accumulated precipitation. In Choi Hung, during the entire year, the rain falls for 224.5 days and collects up to 1264mm (49.76") of precipitation.

Daylight

In Choi Hung, 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 18:40. On the last day of September, in Choi Hung, Hong Kong, sunrise is at 06:14 and sunset at 18:11 HKT.

Sunshine

The average sunshine in September in Choi Hung is 8.4h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in Choi Hung. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for average individuals.
Note: In September, the maximum UV index of 7 translates into these guidelines:
Inhibit overexposure. Warding off sun damage is of utmost importance. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.