December weather forecast
Semporna, Malaysia

The first month of the winter, December, is also a moderately hot month in Semporna, Malaysia, with an average temperature ranging between min 25.7°C (78.3°F) and max 29.7°C (85.5°F).

Temperature

With the advent of December, Semporna's high-temperatures adjust to a warm 29.7°C (85.5°F), closely aligning with the preceding month. In Semporna, a slight decrease from the daytime peak is noted during the month of December, with an average low-temperature of 25.7°C (78.3°F).

Heat index

In December, the heat index is estimated at a very hot 36°C (96.8°F). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.
Heat index specifics point out values are for conditions of shade and a slight breeze. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', gauges the sensation of temperature factoring in the air's moisture content. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. As body temperatures escalate without effective heat release, one might face dehydration threats.

Humidity

In December, the average relative humidity is 78%.

Rainfall

In Semporna, Malaysia, in December, it is raining for 25.6 days, with typically 120mm (4.72") of accumulated precipitation. In Semporna, during the entire year, the rain falls for 278.4 days and collects up to 1091mm (42.95") of precipitation.

Sea temperature

In December, the average sea temperature is 28.8°C (83.8°F).
Note: For engaging in water activities including swimming and diving, temperatures from 25°C (77°F) to 29°C (84.2°F) are perceived as perfect, providing pleasure for extended durations.

Daylight

The month with the shortest days in Semporna, Malaysia, is December, with an average of 11h and 54min of daylight.
On the first day of the month, sunrise is at 5:58 am and sunset at 5:51 pm. On the last day of December, in Semporna, sunrise is at 6:12 am and sunset at 6:04 pm +08.

Sunshine

December has the least sunshine of the year, with an average of 7.3h of sunshine.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index. The months with the lowest UV index in Semporna are January through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: The daily high UV index of 7 in December translates into this advice:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Stay alert! Reflective properties of sand and water amplify the Sun's UV radiation.