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

With December's arrival, Daru's weather records an average high-temperature of a hot 30.7°C (87.3°F), marking little difference from November's 29.6°C (85.3°F). Daru encounters an average temperature dip to a warm 26.2°C (79.2°F) throughout December, subtly lower than its daytime maximum.

Heat index

During December, the heat index is appraised at a torrid 39°C (102.2°F). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
Observations indicate that the heat index values are for shady locations with light wind. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is the result of factoring in humidity to the air temperature, indicating perceived warmth. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful 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 situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

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

Rainfall

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

Sea temperature

In Daru, in December, the average water temperature is 29.4°C (84.9°F).
Note: Surface water temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are seen as ideal and highly pleasant for extended enjoyment in all water activities.

Daylight

December has the longest days of the year, with an average of 12h and 36min of daylight.
On the first day of December in Daru, 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 in Daru is 8.8h.

UV index

The months with the highest UV index are January, February, April, October through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for average individuals.
Note: During December, 7 as the daily maximum UV index converts into the following advice:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.