December weather forecast
Peralanda, Sri Lanka

The first month of the winter, December, is still a warm month in Peralanda, Sri Lanka, with temperature in the range of an average high of 29.9°C (85.8°F) and an average low of 23.7°C (74.7°F).

Temperature

In December, Peralanda's weather conditions record an average high-temperature of a warm 29.9°C (85.8°F), demonstrating little divergence from the preceding month. December witnesses an average low-temperature hovering around 23.7°C (74.7°F).

Heat index

The heat index value during December is computed to be a torrid 37°C (98.6°F). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.
Be advised, the heat index considers values for conditions in shade and with a light breeze. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. 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. Overheating and dehydration threats arise when heat gain goes beyond what the body can comfortably shed.

Humidity

In December, the average relative humidity is 79%.

Rainfall

In Peralanda, during December, the rain falls for 20.3 days and regularly aggregates up to 139mm (5.47") of precipitation. Throughout the year, in Peralanda, Sri Lanka, there are 265.4 rainfall days, and 1744mm (68.66") of precipitation is accumulated.

Daylight

With an average of 11h and 42min of daylight, December has the shortest days of the year.
On the first day of December in Peralanda, sunrise is at 06:07 and sunset at 17:51. On the last day of the month, sunrise is at 06:21 and sunset at 18:05 +0530.

Sunshine

In December, the average sunshine in Peralanda, Sri Lanka, is 7h.

UV index

The months with the highest UV index are January through April, July, September, November and December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the ordinary person.
Note: An average UV index of 7 in December transforms into this advice:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. 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. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.