December weather forecast
Jurong East, Singapore

Closing the year, December continues to experience dense rainfall, followed closely behind November. The drop in temperature from November is negligible reflecting relative consistency. The region experiences a rise in relative humidity levels confirming the continuation of the wet period. Cloud cover rises to its highest in the year, seriously limiting the quantity of sunshine. Wind speed in December negates the calmness of the previous couple of months and picks up to one of the highest in the year.

Temperature

Jurong East experiences the lowest of its temperatures in January and December, when the average high-temperatures rise to 29.5°C.

Heat index

In December, the heat index is calculated to be a fiery hot 36°C. Exercise more precautions, heat cramps and heat exhaustion are potential risks. Continuous activity could precipitate heatstroke.
Remember that heat index calculations are made for conditions in the shade with light wind. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', comes about by integrating the temperature readings with the humidity levels. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are primarily vital for children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.

Humidity

December is the most humid month, with an average relative humidity of 81%.

Rainfall

The month with the most rainfall is December, when the rain falls for 30.3 days and typically aggregates up to 233mm of precipitation.

Daylight

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

Sunshine

December has the least sunshine of the year, with an average of 7.1h of sunshine.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 7. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the average person.
Note: In December, an average UV index of 7 transforms into the following instructions:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.