December weather forecast
Belawan, Indonesia

December, the first month of the winter in Belawan, is also a moderately hot month, with an average temperature fluctuating between 24.5°C (76.1°F) and 29.7°C (85.5°F).

Temperature

December, on average, is the coldest month, registering a high temperature of 29.7°C (85.5°F) and a low of 24.5°C (76.1°F).

Heat index

December's average heat index is calculated to be a fiery hot 37°C (98.6°F). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.
Remember that heat index calculations are made for conditions in the shade with light wind. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', reflects the feeling of heat when considering both air temperature and humidity. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. When there is an excess of moisture in the atmosphere, the efficiency of the evaporation process is lessened, leading to less efficient body cooling and 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

December is the most humid month, with an average relative humidity of 80%.

Rainfall

In Belawan, in December, during 27.6 rainfall days, 150mm (5.91") of precipitation is typically accumulated. In Belawan, during the entire year, the rain falls for 317.8 days and collects up to 1437mm (56.57") of precipitation.

Sea temperature

In December, the average sea temperature is 29.1°C (84.4°F).
Note: Water temperatures between 25°C (77°F) and 29°C (84.2°F) are regarded as very warm, ensuring all water activities are pleasurable for extended periods without feeling uneasy.

Daylight

The month with the shortest days is December, with an average of 11h and 54min of daylight.
On the first day of the month, sunrise is at 06:16 and sunset at 18:11. On the last day of December, sunrise is at 06:31 and sunset at 18:25 WIB.

Sunshine

The months with the least sunshine are November and December, with an average of 8h of sunshine.

UV index

The months with the highest UV index in Belawan are January through December, with an average maximum UV index of 7. January through December, with an average maximum UV index of 7, are months with the lowest UV index. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: In December, the UV index of 7 transforms into the following advice:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. To cut down UV radiation exposure by about half, sport a wide-brim hat. Heads up! UV intensity is amplified by reflections from water and sand.