December weather forecast
Ciwandan, Indonesia

The first month of the summer, December, is also a hot month in Ciwandan, Indonesia, with an average temperature fluctuating between 25.8°C (78.4°F) and 30.4°C (86.7°F).

Temperature

The arrival of December records an average high-temperature of a still hot 30.4°C (86.7°F), closely related to the 31.2°C (88.2°F) observed in November. Ciwandan, in the month of December, notes an average low temperature of 25.8°C (78.4°F), indicating a small decrease from the daytime highs.

Heat index

The heat index value during December is estimated at a very hot 37°C (98.6°F). Undertake extra safety actions, heat cramps and heat exhaustion are expected. Heatstroke may result from lengthy activity.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is an estimation of the warmth sensation when considering humidity levels. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
The body's natural response to excessive warmth is perspiration, as it allows for cooling through sweat evaporation. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

In December, the average relative humidity is 75%.

Rainfall

In Ciwandan, in December, it is raining for 27.4 days, with typically 129mm (5.08") of accumulated precipitation. Throughout the year, in Ciwandan, Indonesia, there are 273 rainfall days, and 1266mm (49.84") of precipitation is accumulated.

Daylight

With an average of 12h and 30min of daylight, December has the longest days of the year.
On the first day of December in Ciwandan, Indonesia, sunrise is at 05:31 and sunset at 17:58. On the last day of the month, sunrise is at 05:45 and sunset at 18:13 WIB.

Sunshine

The average sunshine in December in Ciwandan, Indonesia, is 9h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the average person.
Note: In December, the maximum UV index of 7 suggests this advice:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.