December weather forecast
Cisarua, Indonesia

The first month of the summer, December, is still a warm month in Cisarua, Indonesia, with an average temperature ranging between max 29.7°C (85.5°F) and min 23.5°C (74.3°F).

Temperature

Cisarua experiences a transition to a moderately hot 29.7°C (85.5°F) in average high-temperatures with the arrival of December, not greatly differing from November's 30.5°C (86.9°F). Throughout the nights in December, an average low-temperature of 23.5°C (74.3°F) is noted.

Heat index

In December, the average heat index is appraised at a torrid 36°C (96.8°F). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.
Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. 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 'real feel' or 'apparent temperature', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

The average relative humidity in December is 77%.

Rainfall

In Cisarua, Indonesia, in December, during 28 rainfall days, 218mm (8.58") of precipitation is typically accumulated. In Cisarua, during the entire year, the rain falls for 294.7 days and collects up to 1921mm (75.63") of precipitation.

Daylight

The month with the longest days is December, with an average of 12h and 30min of daylight.
On the first day of December, sunrise is at 05:26 and sunset at 17:55. On the last day of the month, sunrise is at 05:40 and sunset at 18:10 WIB.

Sunshine

In December, the average sunshine is 8.6h.

UV index

The months with the lowest UV index are January, March, June, November and December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: A typical high UV index of 6 in December suggests the following recommendations:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.