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

Lahad Datu's average high-temperature marks a still hot 30°C (86°F) with the advent of December, closely mirroring that of the preceding month. In Lahad Datu, an average nighttime temperature of 22.8°C (73°F) is expected during December.

Heat index

The average heat index in December is computed to be a sweltering 39°C (102.2°F). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.
Understanding the heat index involves considering values for shaded locales with light wind. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is the outcome of merging air's temperature and its humidity metrics. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
As a reaction to high temperatures, the human body begins to perspire, using the evaporation of sweat to lower its temperature. When the air holds a significant amount of moisture, the efficiency of the evaporation process is decreased, preventing the body from cooling down efficiently, leading to the sensation of overheating. Overheating and dehydration threats arise when heat gain goes beyond what the body can comfortably shed.

Humidity

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

Rainfall

In Lahad Datu, Malaysia, 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 December, the average sea temperature is 28.7°C (83.7°F).
Note: Temperatures between 25°C (77°F) and 29°C (84.2°F) are ideal for swimming, diving, and similar water activities, ensuring pleasure and comfort for extended periods without feeling uneasy.

Daylight

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

Sunshine

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

UV index

March through July, September through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 7 in December interprets into the following recommendations:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. During bright days, sunglasses that offer UVA and UVB defense are recommended. Be cautious! Sand and water surfaces make the Sun's UV rays more potent.