December weather forecast
Lombang, Indonesia

December, the first month of the summer in Lombang, is still a hot month, with an average temperature fluctuating between 31°C (87.8°F) and 25.8°C (78.4°F).

Temperature

The arrival of December brings an average high-temperature of a still tropical 31°C (87.8°F), closely following the temperature pattern of November. Lombang registers a consistent average low-temperature of 25.8°C (78.4°F) during December.

Heat index

December's average heat index is computed to be a blisteringly hot 40°C (104°F). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.
Always consider that heat index estimations are for light winds and places in the shade. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.

Humidity

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

Rainfall

In Lombang, during December, the rain falls for 25.3 days and regularly aggregates up to 138mm (5.43") of precipitation. In Lombang, during the entire year, the rain falls for 208.1 days and collects up to 911mm (35.87") of precipitation.

Sea temperature

November and December, with an average sea temperature of 30.2°C (86.4°F), are months with the warmest seawater.
Note: It is often said that swimming in waters above 30°C (86°F) can feel less revitalizing.

Daylight

December has the longest days of the year, with an average of 12h and 30min of daylight.
On the first day of the month, sunrise is at 04:57 and sunset at 17:27. On the last day of December, sunrise is at 05:11 and sunset at 17:42 WIB.

Sunshine

The average sunshine in December in Lombang is 7.7h.

UV index

February through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: In December, the maximum UV index of 7 transforms into these recommendations:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Attention! UV radiation is ramped up when reflecting off sand and water surfaces.