December weather forecast
Alotau, Papua New Guinea

Closing the year, December carries forward the weather trends noticed in November. The sea temperature again reaches its peak for the year at 29°C (84.2°F). As daylight continues to be generous, the city enjoys its sunny days complemented by cool breezes. Alotau's weather in December remains consistent with previous months, ensuring a pleasant ending to the year. The breezy, warm and sunny days bring a sense of joyous conclusion, rounding off the tropical climate cycle of Alotau.

Temperature

Alotau, Papua New Guinea, transitions into December recording an average high-temperature of a still warm 29.2°C (84.6°F), closely aligning with the preceding month's temperature. Alotau experiences a steady nighttime temperature of 25.1°C (77.2°F) throughout the month of December.

Heat index

December's mean heat index is calculated to be a sweltering 35°C (95°F). Heightened safety actions are necessary, heat cramps and heat exhaustion are probable. Persistent activity may lead to heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'feels like' or 'felt air temperature', shows a temperature sensation when both heat and moisture conditions are combined. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

In December, the average relative humidity is 79%.

Rainfall

In Alotau, in December, it is raining for 20.2 days, with typically 100mm (3.94") of accumulated precipitation. In Alotau, during the entire year, the rain falls for 235.8 days and collects up to 1249mm (49.17") of precipitation.

Sea temperature

January through April and December, with an average sea temperature of 29°C (84.2°F), are months with the warmest seawater in Alotau, Papua New Guinea.
Note: For engaging in water activities including swimming and diving, temperatures from 25°C (77°F) to 29°C (84.2°F) are perceived as perfect, providing pleasure for extended durations.

Daylight

The month with the longest days is December, with an average of 12h and 42min of daylight.
On the first day of the month, sunrise is at 05:26 and sunset at 18:07. On the last day of December, sunrise is at 05:39 and sunset at 18:22 +10.

Sunshine

December has the most sunshine of the year in Alotau, with an average of 10.8h of sunshine.

UV index

The months with the highest UV index are January through April, October through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: A maximum high UV index of 7 in December translates into the following recommendations:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Enhance your sun protection with tightly woven, yet airy clothing. Stay alert! Reflective properties of sand and water amplify the Sun's UV radiation.