December weather forecast
Changi, Singapore

Enriched with cool winds, December marks the year's end with temperatures sliding between 25.2°C (77.4°F) to 29.6°C (85.3°F). It happens to have the maximum number of rainy days, yet this doesn't compromise on the city's festive cheer. Regardless of increased rainfall, air pressure remains steady, ensuring a smooth sailing atmosphere. Daily ample sunshine and longer daylight hours uphold the outdoor spirit of the city. Despite December being the cloudiest month of the year, it offers respite from the heat, making it a favoured travel time.

Temperature

The arrival of December in Changi sees a recorded average high-temperature of a warm 29.6°C (85.3°F), showing little divergence from the previous month's conditions. Changi sees a gentle drop from the daily peak temperature in December, with an average low settling at 25.2°C (77.4°F).

Heat index

December's heat index is evaluated at a very hot 37°C (98.6°F). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
Heat index specifics point out values are for conditions of shade and a slight breeze. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'real feel' or 'felt air temperature', offers an insight into how hot it feels when we factor in moisture content. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.
Perspiring is a crucial mechanism for the human body, allowing it to release excessive warmth through evaporating sweat. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

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

Rainfall

December is the month with the most rainfall. Rain falls for 29.8 days and accumulates 243mm (9.57") of precipitation.

Daylight

December has the shortest days of the year in Changi, with an average of 12h and 0min of daylight.
On the first day of December in Changi, sunrise is at 06:51 and sunset at 18:54. On the last day of the month, sunrise is at 07:05 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

January through December, with an average maximum UV index of 7, are months with the highest UV index in Changi, Singapore. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: An average maximum UV index of 7 in December leads to these recommendations:
Shun overexposure. Protection from sun ravages is indispensable. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.