December weather forecast
Lamongan, Indonesia

December, the first month of the summer in Lamongan, is also a hot month, with an average temperature varying between 23.8°C (74.8°F) and 31.4°C (88.5°F).

Temperature

The advent of December brings an average high-temperature of a still tropical 31.4°C (88.5°F), almost identical to the preceding month. In the month of December, Lamongan experiences an average low-temperature of 23.8°C (74.8°F).

Heat index

In December, the average heat index is estimated at a blisteringly hot 41°C (105.8°F). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.
Heat index's context suggests values are appropriate for shady areas and slight breezes. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', combines air temperature and relative humidity to represent a human perceived temperature equivalent. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

In Lamongan, the average relative humidity in December is 77%.

Rainfall

In December, the rain falls for 28.4 days. Throughout December, 188mm (7.4") of precipitation is accumulated. In Lamongan, during the entire year, the rain falls for 217.3 days and collects up to 1402mm (55.2") of precipitation.

Daylight

With an average of 12h and 30min of daylight, December has the longest days of the year.
On the first day of the month, sunrise is at 05:04 and sunset at 17:34. On the last day of December, in Lamongan, sunrise is at 05:17 and sunset at 17:49 WIB.

Sunshine

In December, the average sunshine in Lamongan, Indonesia, is 8h.

UV index

February, April through December, with an average maximum UV index of 7, are months with the highest UV index in Lamongan. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the average person.
Note: A maximum high daily UV index of 7 during December translates into the following directions:
Resist extreme sun exposure. Guarding against solar damage is essential. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.