December weather forecast
Nantong, China

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December

Weather in December

The chill of winter is in full swing by December in Nantong, and snowfall is not an uncommon sight. The city by the end of the year is cloaked in a white blanket, transforming its façade from the vibrant summer months. The weather often calls for heavy winter clothing, hot drinks, and the warmth of indoors. With fewer rainfall days compared to November, December also brings about lighter showers. Temperatures plummet in contrast to the mild climate experienced in November, marking an end to Nantong’s climatic cycle.

Temperature

The onset of December is marked by a decrease in temperature, transitioning from an enjoyable 16.7°C (62.1°F) in November to a chilly 9.9°C (49.8°F). During the month of December, Nantong experiences a steady low-temperature average of 4.2°C (39.6°F).

Humidity

The least humid month is December, with an average relative humidity of 64%.

Rainfall

In Nantong, in December, it is raining for 7.4 days, with typically 18mm (0.71") of accumulated precipitation. Throughout the year, in Nantong, there are 134.2 rainfall days, and 416mm (16.38") of precipitation is accumulated.

Snowfall

Months with snowfall in Nantong are January through March and December. December is the first month it typically snows. Throughout December, in the average 1.2 snowfall days, it receives 6mm (0.24") of snow. Throughout the year, there are 5.4 snowfall days, and 26mm (1.02") of snow is accumulated.

Sea temperature

In Nantong, the average seawater temperature in December is 10.3°C (50.5°F).
Note: Swimming in 10.3°C (50.5°F) feels unbearing at 13°C (55.4°F) and can be life-risking below 10°C (50°F), causing breathing issues and cold shock, depending on a person's capacity.

Daylight

December has the shortest days of the year in Nantong, with an average of 10h and 6min of daylight.
On the first day of the month, sunrise is at 06:39 and sunset at 16:51. On the last day of December, in Nantong, sunrise is at 06:56 and sunset at 17:02 CST.

Sunshine

The average sunshine in December is 5.5h.

UV index

The months with the lowest UV index in Nantong are January and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for average individuals.
Note: In December, the maximum UV index of 2 suggests this advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. To guard against the harmful effects of the Sun, minimize exposure during midday. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Updated: Jan 24, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are December temperatures in Nantong?
In Nantong, 9.9°C (49.8°F) is the average high-temperature and 4.2°C (39.6°F) is the average low-temperature during December. In August, the average heat index (a.k.a. 'feels like', 'real feel'), which combines relative humidity and air temperature, is appraised at 42°C (107.6°F).
What is the least humid month in Nantong?
With an average relative humidity of 64%, December is the least humid month.
What is the average humidity in December in Nantong?
In December, the average relative humidity in Nantong is 64%.
How many days does it rain in December in Nantong?
In Nantong, in December, during 7.4 rainfall days, 18mm (0.71") of precipitation is typically accumulated.
When does it start to snow in Nantong?
December is the first month it typically snows in Nantong, China. Throughout December, in the average 1.2 snowfall days, it receives 6mm (0.24") of snow.
What is the sea water temperature in December in Nantong?
In Nantong, China, in December, the average water temperature is 10.3°C (50.5°F). At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.
What is the month with the shortest days in Nantong?
The month with the shortest days in Nantong, China, is December, with an average of 10h and 6min of daylight.
What is the average length of the day in December in Nantong?
In December, the average day length is 10h and 6min.
What time are sunrise and sunset in December in Nantong?
On the first day of December, sunrise is at 06:39 and sunset at 16:51. On the last day of the month, sunrise is at 06:56 and sunset at 17:02 CST.
How many hours of sunshine does Nantong have in December?
In December, the average sunshine duration in Nantong is 5.5h.
When is the lowest UV index in Nantong?
January and December, with an average maximum UV index of 2, are months with the lowest UV index in Nantong, China.
What is the UV index reading in December in Nantong?
In December, the average daily maximum UV index in Nantong is 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJFMAMJJASONDecember
Nov
December
Jan
Average high temperature
16.7°C
9.9°C
7.5°C
Average low temperature
10.6°C
4.2°C
2°C
Average pressure
1023mbar
1026.6mbar
1027.5mbar
Average wind speed
12.5km/h
13.2km/h
12.7km/h
Average max. wind speed
13.6km/h
14km/h
13.5km/h
Average wind speed gusts
17.7km/h
18.7km/h
17.8km/h
Average humidity
69%
64%
66%
Average rainfall
24mm
18mm
14mm
Average rainfall days
8.4
7.4
7.1
Average snowfall
0mm
6mm
7mm
Average snowfall days
0
1.2
2.1
Average sea temperature
16.3°C
10.3°C
6.3°C
Average daylight
10h 3min
10h 1min
10h 2min
Average sunshine
5h 2min
5h 3min
5h 1min
Average sunshine days
19.1
21.5
21.8
Average UV index
3
2
2
Average cloud cover
41%
35%
41%
Average visibility
10km
10km
10km
Average temperature in December
Nantong, China
  • Average high temperature in December: 9.9°C

The warmest month (with the highest average high temperature) is August (31.2°C).
The month with the lowest average high temperature is January (7.5°C).

  • Average low temperature in December: 4.2°C

The month with the highest average low temperature is August (24.5°C).
The coldest month (with the lowest average low temperature) is January (2°C).

Average pressure in December
Nantong, China
  • Average pressure in December: 1026.6mbar

The month with the highest atmospheric pressure is January (1027.5mbar).
The month with the lowest atmospheric pressure is July (1004.8mbar).

Average wind speed in December
Nantong, China
  • Average wind speed in December: 13.2km/h

The windiest month (with the highest average wind speed) is February (13.4km/h).
The calmest month (with the lowest average wind speed) is September (11.1km/h).

Average humidity in December
Nantong, China
  • Average humidity in December: 64%

The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is December (64%).

Average rainfall in December
Nantong, China
  • Average rainfall in December: 18mm

The wettest month (with the highest rainfall) is July (84mm).
The driest month (with the least rainfall) is January (14mm).

Average rainfall days in December
Nantong, China
  • Average rainfall days in December: 7.4 days

The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is January (7.1 days).

Average snowfall in December
Nantong, China
  • Average snowfall in December: 6mm

The month with the highest snowfall is February (11mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).

Average snowfall days in December
Nantong, China
  • Average snowfall days in December: 1.2 days

The month with the highest number of snowfall days is January (2.1 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

Average sea temperature in December
Nantong, China
  • Average sea temperature in December: 10.3°C

The best month for swimming (with the highest average sea temperature) is August (26.8°C).
The coldest month (with the lowest average sea temperature) is February (5.4°C).

Average daylight in December /
Average sunshine in December
Nantong, China
  • Average daylight in December: 10h and 1min

The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).

  • Average sunshine in December: 5h and 3min

The month with the most sunshine is August (Average sunshine: 9h and 30min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

Average sunshine days in December
Nantong, China
  • Average sunshine days in December: 21.5 days

The month with the most sunshine days is January (21.8 days).
The month with the least sunshine days is July (9.7 days).

Average UV index in December
Nantong, China
  • Average UV index in December: 2

The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 2).

Average cloud cover in December
Nantong, China
  • Average cloud cover in December: 35

The months with the most cloud cover are February and June (Cloud cover 47).
The month with the least cloud cover is December (Cloud cover 35).

Average visibility in December
Nantong, China
  • Average visibility in December: 10km

The months with the highest visibility are January, February, March, October, November and December (10km).
The months with the lowest visibility are April, May, June, July, August and September (9km).

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