December weather forecast
Lahad Datu, Malaysia

In December, the weather in Lahad Datu, Malaysia, sees another decrease in average temperatures down to 30°C (86°F), continuing the trend from November. Despite the lower temperature, rainfall remains considerable at 110mm (4.33") up from 101mm (3.98") in November. With shorter days at 11.8 hours of daylight and lesser sunshine at 6.5 hours, Lahad Datu's December brings in more clouds, rain, and a cooler climate. Yet, despite these changes, Lahad Datu maintains its humid, tropical climate even as the year ends, epitomizing the city's year-round weather dynamic.

Temperature

The commencement of December notes an average high-temperature of a still hot 30°C (86°F), exhibiting little difference from the previous month. The average low-temperature, in December, is a pleasant 22.8°C (73°F).

Heat index

The heat index value for December is computed to be a very hot 39°C (102.2°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Research indicates the heat index considers values in shaded locales and with light winds. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. Increased relative humidity slows down evaporation, thereby decreasing the rate of heat removal from the body, culminating in a sensation of overheating. 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

In Lahad Datu, the average relative humidity in December is 86%.

Rainfall

In Lahad Datu, in December, during 22.1 rainfall days, 110mm (4.33") of precipitation is typically accumulated. Throughout the year, there are 293.8 rainfall days, and 1354mm (53.31") of precipitation is accumulated.

Sea temperature

In Lahad Datu, in December, the average water temperature is 28.7°C (83.7°F).
Note: Water temperature ranging between 25°C (77°F) and 29°C (84.2°F) is considered very warm and pleasing for everyone. It allows for enjoyable water activities over extended periods without discomfort.

Daylight

The month with the shortest days is December, with an average of 11h and 48min of daylight.
On the first day of the month, sunrise is at 6:00 am and sunset at 5:51 pm. On the last day of December, in Lahad Datu, Malaysia, sunrise is at 6:14 am and sunset at 6:04 pm +08.

Sunshine

December has the least sunshine of the year, with an average of 6.5h of sunshine.

UV index

The months with the highest UV index are March through July, September through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum high UV index of 7 in December translates into the following recommendations:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Notice! The Sun's UV exposure elevates with sand and water reflections.