Nanjing weather in January
In January, Nanjing has an average high of 7 °C44 °F and an average low of −3 °C27 °F, with about 52 mm2.1 in of precipitation. January is the coldest month of the year and ranks 11th for precipitation.
How January compares with other months
Compared with December, January is 1.8 °C3.3 °F cooler on average and wetter by 10 mm0.4 in. Compared with February, January is 2.7 °C4.9 °F cooler on average and drier by 11 mm0.4 in. Daylight lasts about 10.3 hours around the middle of the month. Average relative humidity is 77% and the average cloud amount 61%.
Is January a good time to visit Nanjing?
January is not among the most comfortable months by our comfort score: it is cool (average high 7 °C44 °F) and nights are cold (average low −3 °C27 °F). The most comfortable months in Nanjing are April and May and October.
What to wear in January
For Nanjing in January, pack a warm coat, layers and closed shoes and shoes with good grip, as frost is common.
January 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 January?
In January the average high in Nanjing is 7 °C (44 °F) and the average low is -3 °C (27 °F).
Does it rain a lot in Nanjing in January?
On average about 52 mm (2.1 in) of precipitation falls in January; it ranks 11th of the 12 months.
Is January 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 January?
In the middle of January the day in Nanjing lasts about 10.3 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Nanjing in January?
The average relative humidity in January is about 77%. This is a long-term average for the whole day.
How cloudy is Nanjing in January?
On average about 61% of the sky is covered by cloud in January. 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.