December weather forecast
Port Moresby, Papua New Guinea

Rounding off the year, December in Port Moresby depicts a classic tropical picture. With temperatures climbing to their annual peak, the city reaches a maximum of 30.2°C (86.4°F) and records an annual high sea temperature of 29.3°C (84.7°F). Fully submerged in the monsoon season, the citizens greet the rain with familiarity. However, the healthy dose of sunshine provides an adequate balance. December, being a perfect combination of heavy rain and warm conditions, rightfully wraps up the year in the tropical climate.

Temperature

With average high and low temperatures of 30.2°C (86.4°F) and 24.5°C (76.1°F) respectively, December is Port Moresby's warmest month.

Heat index

For most parts of December, the heat index is appraised at a fiery hot 37°C (98.6°F). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
Realize that the values for the heat index are set for shaded places and light winds. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a numerical representation of warmth when taking temperature and moisture levels into account. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly meaningful for babies and toddlers. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.

Humidity

The average relative humidity in December in Port Moresby, Papua New Guinea, is 75%.

Rainfall

In Port Moresby, in December, during 22.3 rainfall days, 106mm (4.17") of precipitation is typically accumulated. In Port Moresby, during the entire year, the rain falls for 249.8 days and collects up to 1311mm (51.61") of precipitation.

Sea temperature

In Port Moresby, the average seawater temperature in December is 29.3°C (84.7°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is perceived as agreeably warm, making all water activities enjoyable without the risk of discomfort over lengthy durations.

Daylight

The month with the longest days is December, 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 in Port Moresby is 10.9h.

UV index

January, March through May, October through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 7 in December interprets into the following advice:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Alert! UV radiation becomes sharper due to reflections from sand and water.