December weather forecast
Boon Lay, Singapore

The weather in Boon Lay, Singapore attains its peak humidity in December, thereby marking the end of the rainy period. The city registers an all-time high rainfall of 233mm (9.17"), the highest for the entire year. The combination of high rainfall and warm temperatures leaves the city feeling humid and damp. Minimal wind speeds further enhance the dampness, creating an exceptionally wet environment. The decrease in daylight hours, to 12 hours per day, wraps up the year in a rather wet yet warm note.

Temperature

The temperature in Boon Lay hits its lowest levels in January and December, recording an average high-temperature of 29.5°C (85.1°F).

Heat index

The average heat index in December is evaluated at a sweltering 36°C (96.8°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
One way the human body deals with excessive warmth is by perspiring and allowing sweat to evaporate. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The most humid month in Boon Lay is December, with an average relative humidity of 81%.

Rainfall

The month with the most rainfall in Boon Lay 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 in Boon Lay 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

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

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index in Boon Lay. The months with the lowest UV index in Boon Lay are January through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum daily UV index of 7 in December converts into the following recommendations:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.