December weather forecast
Alampil, Sri Lanka

December, the first month of the winter in Alampil, is also a moderately hot month, with an average temperature fluctuating between 21.7°C (71.1°F) and 29.5°C (85.1°F).

Temperature

December, recording an average high temperature of 29.5°C (85.1°F) and a low temperature of 21.7°C (71.1°F), is Alampil's coldest month.

Heat index

The heat index value during December is computed to be a fiery hot 37°C (98.6°F). More preventive actions are needed, risk of heat exhaustion and heat cramps is significant. Prolonged activity may trigger heatstroke.
Heat index determinations are made taking into account the shade and light air movements. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

December is the most humid month, with an average relative humidity of 84%.

Rainfall

In Alampil, in December, during 22.4 rainfall days, 107mm (4.21") of precipitation is typically accumulated. Throughout the year, there are 199.1 rainfall days, and 893mm (35.16") of precipitation is accumulated.

Daylight

The month with the shortest days in Alampil is December, with an average of 11h and 36min of daylight.
On the first day of the month, sunrise is at 06:06 and sunset at 17:44. On the last day of December, in Alampil, sunrise is at 06:21 and sunset at 17:57 +0530.

Sunshine

December has the least sunshine of the year, with an average of 5.1h of sunshine.

UV index

January, October through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the average person.
Note: In December, the maximum UV index of 6 suggests these recommendations:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.