December weather forecastKaliwiru, Indonesia

Weather in December

December, the first month of the summer in Kaliwiru, is still a tropical month, with an average temperature varying between 25.1°C (77.2°F) and 31°C (87.8°F).

Temperature

The shift into December reveals an average high-temperature of a still tropical 31°C (87.8°F), closely mirroring November's climate. The nighttime temperature in Kaliwiru, Indonesia, dips to a moderately hot 25.1°C (77.2°F) on average during December.

Heat index

The heat index value during December is evaluated at a scorching 40°C (104°F). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
One should be cognizant that the heat index values are tailored for shaded spots and mild winds. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'real feel' or 'feels like', is achieved by amalgamating air temperature with the relative humidity readings. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant 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.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

The average relative humidity in December is 76%.

Rainfall

In December, the rain falls for 24.8 days. Throughout December, 128mm (5.04") of precipitation is accumulated. In Kaliwiru, during the entire year, the rain falls for 226.7 days and collects up to 1000mm (39.37") of precipitation.

Daylight

December has the longest days of the year, with an average of 12h and 30min of daylight.
On the first day of December, sunrise is at 05:12 and sunset at 17:42. On the last day of the month, sunrise is at 05:25 and sunset at 17:57 WIB.

Sunshine

December has the least sunshine of the year, with an average of 8.2h of sunshine.

UV index

The months with the highest UV index are February through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum daily UV index of 7 in December interprets into the following recommendations:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.