Climate averages 1991–2020
Nanjing weather
in December.
A cool, fairly dry month: the 11th warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cool month in Nanjing: daytime highs average 9.9°C and nights cool to about 1.1°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 34 mm of rain on roughly 6 days, which makes December a fairly dry month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 10 h 06 min on an average December day.
The nearest other city in this atlas is Zhenzhou (44 km away). In December its highs average 9.7°C, about as warm as Nanjing, with 35 mm of rain.
Among the 884 cities listed in China, Nanjing ranks joint 407th of 884 for the warmest December highs and joint 582nd of 884 for the driest December (rainfall, lowest first). The mean December high of those 884 cities is 7.5°C; Nanjing is 2.4°C warmer than that mean.
From December to January, average highs fall by 2.3°C to 7.6°C, and monthly rainfall rises from 34 mm to 55 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Nanjing climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.6°C-1.0°C | -1.0°C | 55 | 8.0 | 10.310 h |
| February | 10.3°C1.0°C | 1.0°C | 56 | 8.5 | 11.011 h |
| March | 15.0°C5.1°C | 5.1°C | 80 | 10.0 | 12.012 h |
| April | 21.0°C10.8°C | 10.8°C | 94 | 9.0 | 12.913 h |
| May | 25.7°C16.3°C | 16.3°C | 121 | 9.8 | 13.814 h |
| June | 28.6°C20.6°C | 20.6°C | 222 | 11.9 | 14.214 h |
| July | 31.4°C24.7°C | 24.7°C | 210 | 15.1 | 14.014 h |
| August | 30.9°C24.4°C | 24.4°C | 174 | 14.3 | 13.313 h |
| September | 27.1°C19.7°C | 19.7°C | 81 | 8.3 | 12.412 h |
| October | 22.3°C13.7°C | 13.7°C | 54 | 6.3 | 11.411 h |
| November | 16.3°C7.3°C | 7.3°C | 53 | 6.8 | 10.611 h |
| December, selected | 9.9°C1.1°C | 1.1°C | 34 | 5.6 | 10.110 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Zhenzhou in DecemberChina · 44 kmHigh 9.7°C · Low 1.3°C · 35 mm rain
- Ma’anshan in DecemberChina · 49 kmHigh 10.1°C · Low 1.7°C · 36 mm rain
- Chuzhou in DecemberChina · 54 kmHigh 9.7°C · Low 0.8°C · 31 mm rain
- Zhenjiang in DecemberChina · 66 kmHigh 9.7°C · Low 1.2°C · 35 mm rain
- Yangzhou in DecemberChina · 72 kmHigh 9.7°C · Low 1.3°C · 34 mm rain
- Xiannü in DecemberChina · 84 kmHigh 9.8°C · Low 1.2°C · 34 mm rain
- Wuhu in DecemberChina · 85 kmHigh 10.4°C · Low 2.1°C · 40 mm rain
- Licheng, China in DecemberChina · 97 kmHigh 10.3°C · Low 2.2°C · 41 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Nanjing) is explained once on the Nanjing year overview and on the Sources, method and limits page.