Nanjing weather in December
In December, Nanjing has an average high of 9 °C48 °F and an average low of −1 °C30 °F, with about 42 mm1.7 in of precipitation. It is the 11th warmest month of the year and the driest.
How December compares with other months
Compared with November, December is 7 °C12.7 °F cooler on average and drier by 17 mm0.7 in. Compared with January, December is 1.8 °C3.3 °F warmer on average and drier by 10 mm0.4 in. Daylight lasts about 10.1 hours around the middle of the month. Average relative humidity is 75% and the average cloud amount 54%.
Is December a good time to visit Nanjing?
December is not among the most comfortable months by our comfort score: it is cool (average high 9 °C48 °F) and nights are cold (average low −1 °C30 °F). The most comfortable months in Nanjing are April and May and October.
What to wear in December
For Nanjing in December, pack a warm coat, layers and closed shoes and shoes with good grip, as frost is common.
December in nearby places
Other months in Nanjing
- January7 °C44 °F / −3 °C27 °F
- February10 °C50 °F / 0 °C31 °F
- March16 °C60 °F / 4 °C39 °F
- April22 °C72 °F / 10 °C50 °F
- May27 °C81 °F / 16 °C60 °F
- June31 °C87 °F / 20 °C69 °F
- July32 °C90 °F / 25 °C76 °F
- August32 °C89 °F / 24 °C75 °F
- September28 °C83 °F / 19 °C66 °F
- October23 °C74 °F / 12 °C54 °F
- November17 °C62 °F / 6 °C42 °F
- December9 °C48 °F / −1 °C30 °F
Frequently asked questions
How warm is Nanjing in December?
In December the average high in Nanjing is 9 °C (48 °F) and the average low is -1 °C (30 °F).
Does it rain a lot in Nanjing in December?
On average about 42 mm (1.7 in) of precipitation falls in December; it ranks 12th of the 12 months.
Is December the warmest month in Nanjing?
No. The warmest month in Nanjing is July, with an average high of 32 °C (90 °F). The coldest month is January, with an average low of -3 °C (27 °F).
How long is the day in Nanjing in December?
In the middle of December the day in Nanjing lasts about 10.1 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Nanjing in December?
The average relative humidity in December is about 75%. This is a long-term average for the whole day.
How cloudy is Nanjing in December?
On average about 54% of the sky is covered by cloud in December. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.