September weather forecastDongguan, China

Weather in September

September signifies the tail-end of summer in Dongguan, with a drop in temperature and gradual receding of rainfall. The weather begins to cool down, and the rains lessen, heralding the arrival of autumn. Yet, daylight hours stay lengthy, allowing pleasant weather to participate in outdoor activities. Quick showers might occur, but they won't obstruct the overall weather of the city. The rainfall, in September, falls further to 58mm (2.28"), certifying the nearing end of the summer season.

Temperature

In September, the average high-temperature registers at a still hot 32°C (89.6°F), nearly identical to August's 33.8°C (92.8°F). Dongguan witnesses a consistent average low-temperature of 25°C (77°F) throughout September.

Heat index

The heat index for September is appraised at a blistering 42°C (107.6°F). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.
Know that the heat index computations account for shaded terrains and slight winds. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a numerical representation of warmth when taking temperature and moisture levels into account. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

In Dongguan, the average relative humidity in September is 74%.

Rainfall

In September, the rain falls for 18.3 days. Throughout September, 58mm (2.28") of precipitation is accumulated. In Dongguan, during the entire year, the rain falls for 178.4 days and collects up to 559mm (22.01") of precipitation.

Daylight

In Dongguan, the average length of the day in September is 12h and 17min.
On the first day of September, sunrise is at 06:07 and sunset at 18:42. On the last day of the month, sunrise is at 06:16 and sunset at 18:13 CST.

Sunshine

In Dongguan, the average sunshine in September is 7.8h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in Dongguan. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, the maximum UV index of 7 suggests this advice:
Take precautions against overexposure. Protection against sun damage is needed. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Boost your sun resistance with garments that are densely woven yet spacious.