December weather forecast
Seletar, Singapore

December sets the stage for the winter charm, but this does not translate into colder days in Seletar, Singapore. This month sees the highest rainfall of the year with 102mm (4.02"), conjuring a unique blend of tropical showers and equatorial warmth. Despite the rains, the temperature remains steady, ensuring a warm winter month. The season's merriment isn't dimmed as the daylight hours remain constant, making December festivities more exciting. Mild winds and varying visibility might influence outdoor plans, but the city's indoor activities remain as charming and inviting as ever.

Temperature

The advent of December in Seletar signifies a minor shift to an average high-temperature of a still hot 30.1°C (86.2°F), aligning closely with November. In December, the nighttime temperature lowers to an average of 24.9°C (76.8°F).

Heat index

The heat index value for December is evaluated at a torrid 39°C (102.2°F). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
Always consider that heat index estimations are for light winds and places in the shade. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'real feel' or 'feels like', integrates the air's temperature and its humidity to showcase the felt temperature by people. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Perspiration, followed by sweat evaporation, is the human body's chief method to maintain a balanced temperature. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.

Humidity

The most humid month is December, with an average relative humidity of 82%.

Rainfall

December is the month with the most rainfall in Seletar. Rain falls for 25 days and accumulates 102mm (4.02") of precipitation.

Daylight

With an average of 12h and 0min of daylight, December has the shortest days of the year in Seletar.
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 19:08 +08.

Sunshine

With an average of 6.9h of sunshine, December has the least sunshine of the year.

UV index

With an average maximum UV index of 6, December is the month with the lowest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In December, a daily maximum UV index of 6 leads to the following instructions:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.