December weather forecast
Ruteng, Indonesia

December, the first month of the summer in Ruteng, is still a tropical month, with an average temperature varying between 30°C (86°F) and 25.6°C (78.1°F).

Temperature

December notes an average high-temperature of a still hot 30°C (86°F), subtly differing from November's 30.5°C (86.9°F). An average temperature of 25.6°C (78.1°F) is logged during the nights of December, a small step down from daytime highs.

Heat index

In December, the average heat index is calculated to be a torrid 37°C (98.6°F). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
Research indicates the heat index considers values in shaded locales and with light winds. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', combines both the air temperature and the humidity level to give a perceived human temperature. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. 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. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.

Humidity

In Ruteng, the average relative humidity in December is 78%.

Rainfall

In Ruteng, in December, during 28.5 rainfall days, 156mm (6.14") of precipitation is typically accumulated. Throughout the year, there are 191.2 rainfall days, and 892mm (35.12") of precipitation is accumulated.

Daylight

With an average of 12h and 36min of daylight, December has the longest days of the year.
On the first day of the month, sunrise is at 05:29 and sunset at 18:04. On the last day of December, sunrise is at 05:42 and sunset at 18:19 WITA.

Sunshine

In December, the average sunshine is 10.4h.

UV index

The months with the highest UV index are January through June, August through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: A maximum high UV index of 7 in December translates into the following recommendations:
Prevent overexposure. Protection from the sun's harmful effects is needed. 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. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.