December weather forecast
Singapore, Singapore

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.