December weather forecast
Singapore, Singapore

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The colorful night skyline of Singapore city in Singapore
The colorful night skyline of Singapore city in Singapore

Weather in December

December brings a close to the year in Singapore, continuing the trend of high precipitations from November. Notably, December receives the highest annual rainfall, with a measurement of 287mm (11.3"). This increase in precipitation follows in the footsteps of November's weather trend, indicating the height of the Northeast Monsoon. Despite occasional bouts of heavy rain, temperatures, both day and night, remain comfortably warm. The year concludes with December demonstrating the essence of Singapore's tropical climate - warm, humid, and vibrant.

Temperature

December, characterized by an average high temperature of 30°C (86°F) and a low temperature of 23.5°C (74.3°F), is generally the coldest month in Singapore.

Heat index

December's average heat index is computed to be an extremely hot 40°C (104°F). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
It is crucial to understand that heat index figures are for shade and gentle wind conditions. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are quite important for children. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

With an average relative humidity of 86.9%, December is the most humid month in Singapore.

Rainfall

The month with the most rainfall is December, when the rain falls for 19 days and typically aggregates up to 287mm (11.3") of precipitation.

Sea temperature

In December, the average sea temperature in Singapore, Singapore, is 29°C (84.2°F).
Note: Water temperature from 25°C (77°F) to 29°C (84.2°F) is considered very warm, making water activities enjoyable for prolonged periods without any uncomfortable sensations.

Daylight

With an average of 12h and 0min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 06:52 and sunset at 18:55. On the last day of December, sunrise is at 07:06 and sunset at 19:09 +08.

Sunshine

The months with the least sunshine are November and December, with an average of 4.3h of sunshine.

UV index

The months with the highest UV index in Singapore are January through May, August through December, with an average maximum UV index of 12. A UV Index estimate of 11, and higher, represents an ultimate health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: A maximum daily UV index of 12 during December morphs into the following directions:
Carry out every crucial safety measure. People with fair skin may sustain burns in fewer than 5 minutes. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Experience reduced UV exposure by about half when donning a wide-brim hat. A sunscreen boasting a minimum SPF of 30 should be generously applied and reapplied even on cloudy days, post swim or outdoor exercise. Caution! The mirror effect of sand and water ups the UV radiation strength.

Frequently asked questions

What are the coldest months in Singapore?

Singapore's coldest weather arrives in December, when temperatures average a high of 30°C (86°F) and a low of 23.5°C (74.3°F).

Is it hot in Singapore during December?

The average high-temperature, in December, in Singapore, is 30°C (86°F), while the average low-temperature is 23.5°C (74.3°F). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in December is computed to be 40°C (104°F).

What is the most humid month in Singapore?

December is the most humid month in Singapore, Singapore, with an average relative humidity of 86.9%.

What is the average humidity in December in Singapore?

The average relative humidity in December in Singapore, Singapore, is 86.9%.

What is the wettest month in Singapore?

The month with the most rainfall in Singapore is December, when the rain falls for 19 days and typically aggregates up to 287mm (11.3") of precipitation.

How much does it rain in Singapore in December?

In Singapore, Singapore, during December, the rain falls for 19 days and regularly aggregates up to 287mm (11.3") of precipitation.

What is the sea water temperature in December in Singapore?

In Singapore, in December, the average water temperature is 29°C (84.2°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the month with the shortest days in Singapore?

December has the shortest days of the year in Singapore, with an average of 12h and 0min of daylight.

What is the average length of the day in December in Singapore?

The average day length in December in Singapore, Singapore, is 12h and 3min.

What time are sunrise and sunset in December in Singapore?

In December, on the first day of the month, sunrise is at 06:52 and sunset at 18:55. On the last day of the month, in Singapore, sunrise is at 07:06 and sunset at 19:09 +08.

What is the month with the least sunshine in Singapore?

The months with the least sunshine in Singapore are November and December, with an average of 4.3h of sunshine.

How many hours of sunshine does Singapore have in December?

The average sunshine duration in December in Singapore, Singapore, is 4.3h.

What are the months with the highest UV index in Singapore?

January through May, August through December, with an average maximum UV index of 12, are months with the highest UV index.

What is the UV index reading in December in Singapore?

In Singapore, Singapore, the average daily maximum UV index in December is 12. A UV Index value of 11, and more, symbolizes an extreme health vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in December
Singapore, Singapore

Average temperature in December - Singapore, Singapore
  • Average high temperature in December: 30°C

The warmest month (with the highest average high temperature) is April (31.7°C).
The month with the lowest average high temperature is December (30°C).

  • Average low temperature in December: 23.5°C

The months with the highest average low temperature are May and June (24.8°C).
The coldest month (with the lowest average low temperature) is January (23.3°C).

Average humidity in December
Singapore, Singapore

Average humidity in December - Singapore, Singapore
  • Average humidity in December: 86.9%

The month with the highest relative humidity is December (86.9%).
The months with the lowest relative humidity are February and July (82.8%).

Average rainfall in December
Singapore, Singapore

Average rainfall in December - Singapore, Singapore
  • Average rainfall in December: 287.4mm

The wettest month (with the highest rainfall) is December (287.4mm).
The driest month (with the least rainfall) is July (158.7mm).

Average rainfall days in December
Singapore, Singapore

Average rainfall days in December - Singapore, Singapore
  • Average rainfall days in December: 19 days

The months with the highest number of rainy days are November and December (19 days).
The month with the least rainy days is February (11 days).

Average sea temperature in December
Singapore, Singapore

Average sea temperature in December - Singapore, Singapore
  • Average sea temperature in December: 29°C

The best months for swimming (with the highest average sea temperature) are May and June (30.2°C).
The coldest month (with the lowest average sea temperature) is January (27.7°C).

Average daylight in December /
Average sunshine in December
Singapore, Singapore

Average daylight in December / Average sunshine in December - Singapore, Singapore
  • Average daylight in December: 12h and 0min

The month with the longest days is June (Average daylight: 12h and 12min).
The month with the shortest days is December (Average daylight: 12h and 0min).

  • Average sunshine in December: 4h and 2min

The month with the most sunshine is February (Average sunshine: 6h and 30min).
The months with the least sunshine are November and December (Average sunshine: 4h and 18min).

Average UV index in December
Singapore, Singapore

Average UV index in December - Singapore, Singapore
  • Average UV index in December: 12

The months with the highest UV index are January, February, March, April, May, August, September, October, November and December (UV index 12).
The months with the lowest UV index are June and July (UV index 11).

Singapore, Singapore

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