December weather forecast
Madang, Papua New Guinea

December in Madang wraps up the year on an energetic note, maintaining the excitement across the weather spectrum. The atmosphere buzzes with festive advent, reinforced by the dynamic interplay of sunshine and rainfall. Holidaymakers find themselves gravitated towards the region, adding to the seasonal cheer. Wet days outnumber their dry counterparts as rainfall peaks to 382mm (15.04"). Despite increased precipitation, December remains a favourite amongst visitors, providing the perfect end to the year's weather tapestry.

Temperature

As Madang steps into December, the average high-temperature is measured at a still tropical 30.9°C (87.6°F), displaying minor differences from November's 31.2°C (88.2°F). December nights cool down to an average low-temperature of 23.9°C (75°F).

Heat index

Throughout December, the heat index is evaluated at a blistering 42°C (107.6°F). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.
One should be cognizant that the heat index values are tailored for shaded spots and mild winds. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is the outcome of merging air's temperature and its humidity metrics. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. An increase in relative humidity disrupts body cooling by slowing the evaporation rate, thereby reducing the rate at which the body cools and amplifying the sense of heat. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.

Humidity

The average relative humidity in December in Madang is 84%.

Rainfall

In Madang, in December, it is raining for 23 days, with typically 382mm (15.04") of accumulated precipitation. Throughout the year, there are 224 rainfall days, and 3107mm (122.32") of precipitation is accumulated.

Sea temperature

December is the month with the warmest seawater in Madang, with an average sea temperature of 29.9°C (85.8°F).
Note: Ideal surface water temperatures for any water activity fall between 25°C (77°F) and 29°C (84.2°F), offering maximum enjoyment for lengthened periods.

Daylight

With an average of 12h and 24min of daylight, December has the longest days of the year.
On the first day of the month, sunrise is at 05:53 and sunset at 18:18. On the last day of December, in Madang, sunrise is at 06:07 and sunset at 18:32 +10.

Sunshine

The average sunshine in December is 5.2h.

UV index

January through May, August through December, with an average maximum UV index of 12, are months with the highest UV index. A UV Index estimate of 11, and higher, represents an excessive health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: In December, a daily maximum UV index of 12 leads to the following instructions:
Execute all vital precautions. Preventing sun damage is of utmost importance. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Despite the cloudy weather, sunscreen with a sun protection factor of at least 30 should be liberally applied and reapplied, including after a swim or outdoor activity. Be on guard! The reflective nature of sand and water boosts UV exposure.