December weather forecast
Vanimo, Papua New Guinea

December brings the highest rainfall observed since January. The city experiences a significant rainfall of 219mm (8.62"), thereby bringing the year to a wet close. The temperature does not undergo any drastic changes, adhering to the overall annual trend. Sunlight hours and humidity levels remain consistent, setting the stage for a pleasant end to the year. December's weather in Vanimo offers a dynamic mix of warm, humid conditions and high rainfall, signifying an eventful closure of the year's weather narrative.

Temperature

The onset of December in Vanimo brings an average high-temperature of a still warm 28.9°C (84°F), nearly matching the November temperature. Vanimo consistently logs a low temperature averaging a still warm 25.4°C (77.7°F) during December, a modest drop from daytime temperatures.

Heat index

The heat index value for December is calculated to be a very hot 35°C (95°F). Implement more preventive measures, heat cramps and heat exhaustion are probable. Heatstroke might result from extended activity.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', reflects the blend of air temperature and relative humidity to give a temperature impression. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
The physiological way the human body responds to excessive heat is by inducing perspiration, using sweat evaporation as a cooling mechanism. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

In December, the average relative humidity is 81%.

Rainfall

The month with the most rainfall in Vanimo is December, when the rain falls for 26.8 days and typically aggregates up to 219mm (8.62") of precipitation.

Sea temperature

In Vanimo, in December, the average water temperature is 29.3°C (84.7°F).
Note: Swimming, diving, and other water endeavors at temperatures between 25°C (77°F) and 29°C (84.2°F) are considered enjoyable and satisfying for extended periods without discomfort.

Daylight

With an average of 12h and 18min of daylight, December has the longest days of the year in Vanimo.
On the first day of December, sunrise is at 06:15 and sunset at 18:31. On the last day of the month, sunrise is at 06:29 and sunset at 18:46 +10.

Sunshine

The average sunshine in December is 7.9h.

UV index

The months with the lowest UV index in Vanimo, Papua New Guinea, are January and December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: The UV index of 6 during December translates into the following guidance:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. 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. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Caution! The Sun's UV rays become stronger due to reflections from water and sand.