December weather forecast
Waigani, Papua New Guinea

Wrapping up the weather year in Waigani, December presents a warm and wet climate. Echoing the trends of a tropical city, the temperatures, hitting a high of 30.2°C (86.4°F), peak in December, outdoing all the previous months. Correspondingly, rainfall also sees a hike, culminating into denser cloud cover across the city. The availability of sunshine dips slightly while wind speeds reduce, serving as a subtle herald for the upcoming weather transitions in the new year.

Temperature

December, recognised by an average high temperature of 30.2°C (86.4°F) and a low of 24.5°C (76.1°F), is Waigani's warmest month.

Heat index

The average heat index in December is calculated to be a sweltering 37°C (98.6°F). Ensure extra safety steps, heat exhaustion and heat cramps are likely. Long activity might lead to heatstroke.
When assessing, remember that heat index measurements are for light winds and shaded spots. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. Rising body temperatures due to excess heat retention could signify impending heat disorders.

Humidity

In Waigani, the average relative humidity in December is 75%.

Rainfall

In Waigani, in December, it is raining for 22.3 days, with typically 106mm (4.17") of accumulated precipitation. Throughout the year, there are 249.8 rainfall days, and 1311mm (51.61") of precipitation is accumulated.

Daylight

December has the longest days of the year, with an average of 12h and 42min of daylight.
On the first day of December, sunrise is at 05:41 and sunset at 18:19. On the last day of the month, sunrise is at 05:54 and sunset at 18:34 +10.

Sunshine

In December, the average sunshine is 10.9h.

UV index

The months with the highest UV index are January, March through May, October through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for average individuals.
Note: The maximum daily UV index of 7 during December translates into the following directions:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Stay sun-safe with clothing that is both closely woven and worn loosely.