December weather forecast
Bukit Timah, Singapore

Rounding off the year, December continues with the monsoon season in Bukit Timah. With average temperatures ranging from 25.3°C (77.5°F) to 29.5°C (85.1°F), the weather remains warm, but not excessively hot. The frequent rainfall can be a deterrent for some tourists, but the city still offers plenty to do indoors. The noticeably higher humidity levels also result in maximum cloud coverage. Moreover, despite the rains and overcast conditions, the spirit of the holiday season keeps the city cheerful and vibrant.

Temperature

Bukit Timah's coldest season falls during January and December, averaging a high-temperature of 29.5°C (85.1°F).

Heat index

For most parts of December, the heat index is estimated at a sweltering 36°C (96.8°F). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
Bear in mind that the heat index values are determined for shaded areas and light breezes. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', binds temperature metrics with humidity values to give a sense of the actual warmth. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are highly critical for babies and toddlers. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

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

Rainfall

The month with the most rainfall in Bukit Timah is December, when the rain falls for 30.3 days and typically aggregates up to 233mm (9.17") of precipitation.

Daylight

The month with the shortest days is December, 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 in Bukit Timah are January through December, with an average maximum UV index of 7. The months with the lowest UV index in Bukit Timah, Singapore, are January through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: In December, the maximum UV index of 7 suggests these recommendations:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.