December weather forecast
Shanghai, China

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The mother River Huangpu dividing the city into two in Shanghai, China
The mother River Huangpu dividing the city into two in Shanghai, China

December

Weather in December

December in Shanghai encompasses the chilly and quiet ambiance that winter brings. Lower temperatures, reaching a low of 4.7°C (40.5°F), and lower rainfall levels at 44mm (1.73"), give the city a quiet charm. Despite shorter daylight hours, the festive spirit keeps the city lively and vibrant. Even though it's the start of winter, Shanghai does not experience snow, hence outdoor activities continue. While December might not have the best weather, the city's Christmas markets and New Year celebrations provide a unique experience.

Temperature

December is characterized by a reduction in the average high-temperature, from a refreshing 17.3°C (63.1°F) in November to a cool 11.1°C (52°F). Throughout December nights, Shanghai registers an average low-temperature of 4.7°C (40.5°F).

Humidity

December is the least humid month in Shanghai, with an average relative humidity of 71%.

Rainfall

December is the month with the least rainfall. Rain falls for 7.7 days and accumulates 44mm (1.73") of precipitation.

Sea temperature

In December, the average sea temperature is 14°C (57.2°F).
Note: Swimming in 14°C (57.2°F) is deemed hazardous. Exposure to temperatures below 10°C (50°F) leads to immediate severe cold shock and hyperventilation.

Daylight

With an average of 10h and 12min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 06:35 and sunset at 16:51. On the last day of December, sunrise is at 06:52 and sunset at 17:01 CST.

Sunshine

The average sunshine in December is 4.1h.

UV index

With an average maximum UV index of 3, December is the month with the lowest UV index. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: In December, the maximum UV index of 3 suggests this advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Updated: Jun 24, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are December temperatures?
In December, the average high-temperature and low-temperature are 11.1°C (52°F) and 4.7°C (40.5°F) respectively. In September, the average heat index (a.k.a. 'real feel', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, is calculated to be 31°C (87.8°F).
What is the least humid month?
The least humid month is December, with an average relative humidity of 71%.
What is the average humidity in December?
In Shanghai, the average relative humidity in December is 71%.
What is the driest month?
The month with the least rainfall is December, when the rain falls for 7.7 days and typically collects 44mm (1.73") of precipitation.
How many days does it rain in December?
In Shanghai, in December, it is raining for 7.7 days, with typically 44mm (1.73") of accumulated precipitation.
How cold is the water in December?
In Shanghai, the average seawater temperature in December is 14°C (57.2°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?
With an average of 10h and 12min of daylight, December has the shortest days of the year.
What is the average length of the day in December?
The average day length in December is 10h and 10min.
When is the sunrise / sunset in December?
In December, on the first day of the month, sunrise is at 06:35 and sunset at 16:51. On the last day of the month, sunrise is at 06:52 and sunset at 17:01 CST.
How many hours of sunshine does Shanghai have in December?
In Shanghai, China, the average sunshine duration in December is 4.1h.
When is the lowest UV index?
With an average maximum UV index of 3, December is the month with the lowest UV index.
What is the UV index intensity in December?
The average daily maximum UV index in December is 3. A UV Index value of 3 to 5 symbolizes a moderate health threat from unsafe exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJFMAMJJASONDecember
Nov
December
Jan
Average high temperature
17.3°C
11.1°C
8.1°C
Average low temperature
10.6°C
4.7°C
2.1°C
Average humidity
72%
71%
74%
Average rainfall
52.3mm
43.9mm
74.4mm
Average rainfall days
7.6
7.7
9.9
Average sea temperature
18°C
14°C
10°C
Average daylight
10h 4min
10h 1min
10h 2min
Average sunshine
4h 2min
4h 1min
3h 4min
Average UV index
4
3
4
Average temperature in December - Shanghai, China
Average temperature in December
Shanghai, China
  • Average high temperature in December: 11.1°C

The warmest month (with the highest average high temperature) is July (32.2°C).
The month with the lowest average high temperature is January (8.1°C).

  • Average low temperature in December: 4.7°C

The months with the highest average low temperature are July and August (25.8°C).
The coldest month (with the lowest average low temperature) is January (2.1°C).

Average humidity in December - Shanghai, China
Average humidity in December
Shanghai, China
  • Average humidity in December: 71%

The month with the highest relative humidity is June (79%).
The month with the lowest relative humidity is December (71%).

Average rainfall in December - Shanghai, China
Average rainfall in December
Shanghai, China
  • Average rainfall in December: 43.9mm

The wettest month (with the highest rainfall) is August (213.7mm).
The driest month (with the least rainfall) is December (43.9mm).

Average rainfall days in December - Shanghai, China
Average rainfall days in December
Shanghai, China
  • Average rainfall days in December: 7.7 days

The month with the highest number of rainy days is June (12.7 days).
The month with the least rainy days is October (6.9 days).

Average sea temperature in December - Shanghai, China
Average sea temperature in December
Shanghai, China
  • Average sea temperature in December: 14°C

The best month for swimming (with the highest average sea temperature) is August (27°C).
The coldest months (with the lowest average sea temperature) are February and March (8°C).

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

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

  • Average sunshine in December: 4h and 1min

The month with the most sunshine is July (Average sunshine: 6h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

Average UV index in December - Shanghai, China
Average UV index in December
Shanghai, China
  • Average UV index in December: 3

The months with the highest UV index are June, July and August (UV index 11).
The month with the lowest UV index is December (UV index 3).

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