September weather forecast
Longgui, China

September, the first month of the autumn in Longgui, is still a hot month, with an average temperature varying between 31.7°C (89.1°F) and 23.9°C (75°F).

Temperature

The onset of September marks an average high-temperature of a still tropical 31.7°C (89.1°F), hardly differing from August's 33.4°C (92.1°F). During the month of September, Longgui's nighttime temperature lowers to an average of 23.9°C (75°F).

Heat index

September's heat index is appraised at a blisteringly hot 42°C (107.6°F). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
Bear in mind that the heat index values are determined for shaded areas and light breezes. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'real feel' or 'felt air temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. Increased relative humidity slows down evaporation, thereby decreasing the rate of heat removal from the body, culminating in a sensation of overheating. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

In Longgui, the average relative humidity in September is 77%.

Rainfall

In Longgui, China, during September, the rain falls for 18.8 days and regularly aggregates up to 80mm (3.15") of precipitation. In Longgui, during the entire year, the rain falls for 204.3 days and collects up to 1022mm (40.24") of precipitation.

Daylight

In September, the average length of the day in Longgui is 12h and 17min.
On the first day of the month, sunrise is at 06:08 and sunset at 18:44. On the last day of September, sunrise is at 06:18 and sunset at 18:15 CST.

Sunshine

In Longgui, the average sunshine in September is 8h.

UV index

In Longgui, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: In September, the maximum UV index of 6 suggests this advice:
Take precautions against overexposure. Protection against sun damage is needed. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.