September weather forecast
Nanjing, China

Cushioned nicely between summer and fall, September in Nanjing is a month of transformation. As Fall begins to make its presence known, temperatures start to gently dip, signaling milder weather. From the peak of summer, the weather now cools, bringing down the temperature to a pleasant average high of 27°C (80.6°F). It's the month where foliage begins to riot into brilliant hues of red, orange, and yellow. Thus, September turns out to be an excellent month to step out and appreciate the city's transforming landscapes.

Temperature

September ushers in a slight temperature change, with average high-temperatures reducing from August's tropical 32°C (89.6°F) to a warm 27°C (80.6°F). Throughout the month of September, Nanjing witnesses an average temperature of 19°C (66.2°F).

Rainfall

In Nanjing, in September, it is raining for 11 days, with typically 95mm (3.74") of accumulated precipitation. Throughout the year, there are 125 rainfall days, and 1048mm (41.26") of precipitation is accumulated.

Daylight

In Nanjing, the average length of the day in September is 12h and 22min.
On the first day of September, sunrise is at 05:40 and sunset at 18:29. On the last day of the month, sunrise is at 05:58 and sunset at 17:51 CST.

Sunshine

In Nanjing, the average sunshine in September is 6h.

UV index

In Nanjing, the average daily maximum UV index in September is 9. A UV Index reading of 8 to 10 represents a very high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum UV index, 9 during September, leads to the following recommendations:
Take special precautions, as unprotected eyes and skin can be burned and damaged quickly. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.