December weather forecast
Metro, Indonesia

The first month of the summer, December, is also a hot month in Metro, Indonesia, with temperature in the range of an average low of 23.7°C (74.7°F) and an average high of 31.4°C (88.5°F).

Temperature

December ushers in an average high-temperature of a still tropical 31.4°C (88.5°F), aligning closely with the preceding month. The nights of December anticipate an average low-temperature of 23.7°C (74.7°F).

Heat index

For December, the heat index is estimated at a blistering 43°C (109.4°F). Remain cautious: Heat cramps along with heat exhaustion are foreseeable. Ongoing activity may precipitate heatstroke.
When referencing the heat index, its values are suitable for shady environments and light breezes. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is the result of factoring in humidity to the air temperature, indicating perceived warmth. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
As a reaction to high temperatures, the human body begins to perspire, using the evaporation of sweat to lower its temperature. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

In December, the average relative humidity is 82%.

Rainfall

In Metro, during December, the rain falls for 29.1 days and regularly aggregates up to 216mm (8.5") of precipitation. In Metro, during the entire year, the rain falls for 285.3 days and collects up to 1612mm (63.46") of precipitation.

Daylight

The month with the longest days is December, with an average of 12h and 24min of daylight.
On the first day of the month, sunrise is at 05:35 and sunset at 17:59. On the last day of December, sunrise is at 05:49 and sunset at 18:14 WIB.

Sunshine

In December, the average sunshine is 8.4h.

UV index

The months with the highest UV index are March through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum daily UV index of 7 during December translates into the following directions:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.