December weather forecast
Wiyung, Indonesia

The first month of the summer, December, is also a hot month in Wiyung, Indonesia, with an average temperature ranging between max 31.2°C (88.2°F) and min 26.3°C (79.3°F).

Temperature

The introduction of December sees an average high-temperature of a still tropical 31.2°C (88.2°F), hardly deviating from November. In Wiyung, December nights experience a modest descent in temperature from daily peaks, cooling down to an average of 26.3°C (79.3°F).

Heat index

The heat index value for December is appraised at a sweltering 39°C (102.2°F). More protective measures are required - heat exhaustion and heat cramps are likely. Heatstroke may follow lengthy activity.
Heat index's context suggests values are appropriate for shady areas and slight breezes. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', is a numerical representation of warmth when taking temperature and moisture levels into account. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
The process of perspiration is vital for the human body to get rid of excess warmth by allowing sweat to evaporate. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

In December, the average relative humidity is 74%.

Rainfall

In Wiyung, in December, during 24.7 rainfall days, 102mm (4.02") of precipitation is typically accumulated. In Wiyung, during the entire year, the rain falls for 187.8 days and collects up to 839mm (33.03") of precipitation.

Daylight

With an average of 12h and 30min of daylight, December has the longest days of the year in Wiyung.
On the first day of December, sunrise is at 05:02 and sunset at 17:33. On the last day of the month, sunrise is at 05:16 and sunset at 17:48 WIB.

Sunshine

The average sunshine in December in Wiyung is 8.6h.

UV index

The months with the highest UV index in Wiyung, Indonesia, are January through December, with an average maximum UV index of 7. The months with the lowest UV index in Wiyung are January through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: A maximum daily UV index of 7 during December morphs into the following directions:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.