December weather forecast
Daru, Papua New Guinea

December marks the return of the wetter season in Daru in full swing. The climate sees a rise in humidity and a jump in rainfall to 138mm (5.43"), which aligns with the prevailing weather pattern. The cloud cover increases, consequently reducing the overall sunlight hours. Although wind speeds drop to 11.2km/h (7mph), the weather features heightened moisture levels due to the warmer sea temperature. As a result, December sees most activities being concentrated indoors due to the rain-soaked surroundings.

Temperature

December's average high-temperature stands at a hot 30.7°C (87.3°F), showing little deviation from November's 29.6°C (85.3°F). Daru experiences a steady nighttime temperature of 26.2°C (79.2°F) throughout the month of December.

Heat index

Throughout December, the heat index is calculated to be a very hot 39°C (102.2°F). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', melds the effects of warmth and moisture to generate a feeling of heat. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.

Humidity

The least humid month is December, with an average relative humidity of 76%.

Rainfall

In Daru, in December, during 22.2 rainfall days, 138mm (5.43") of precipitation is typically accumulated. Throughout the year, there are 279.2 rainfall days, and 1712mm (67.4") of precipitation is accumulated.

Sea temperature

In December, the average sea temperature in Daru is 29.4°C (84.9°F).
Note: Surface water temperatures between 25°C (77°F) and 29°C (84.2°F) offer outstanding conditions for any water activity, providing extreme pleasure for extended periods.

Daylight

With an average of 12h and 36min of daylight, December has the longest days of the year.
On the first day of December, sunrise is at 05:57 and sunset at 18:34. On the last day of the month, sunrise is at 06:10 and sunset at 18:49 +10.

Sunshine

The average sunshine in December is 8.8h.

UV index

January, February, April, 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 threat to health from unsafe exposure to UV radiation for the average person.
Note: In December, the maximum UV index of 7 suggests this advice:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. 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. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Take warning! Reflective sand and water surfaces intensify the Sun's UV rays.