December weather forecast
Dunagaha, Sri Lanka

December, the first month of the winter in Dunagaha, is also a moderately hot month, with temperature in the range of an average low of 23.7°C (74.7°F) and an average high of 29.9°C (85.8°F).

Temperature

The arrival of December denotes a barely perceptible change in the average high-temperatures to a warm 29.9°C (85.8°F) from November's 30.2°C (86.4°F). An average temperature of 23.7°C (74.7°F) is recorded during the nights in December.

Heat index

The heat index value during December is calculated to be a very hot 37°C (98.6°F). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.
One should be cognizant that the heat index values are tailored for shaded spots and mild winds. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', blends air temperature and moisture content to represent the felt temperature to humans. 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. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
The human body keeps its cool primarily through perspiration, as this process enables sweat to evaporate, taking away the excess heat. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

In December, the average relative humidity in Dunagaha is 79%.

Rainfall

In Dunagaha, in December, it is raining for 20.3 days, with typically 139mm (5.47") of accumulated precipitation. Throughout the year, in Dunagaha, there are 265.4 rainfall days, and 1744mm (68.66") of precipitation is accumulated.

Daylight

December has the shortest days of the year, with an average of 11h and 42min of daylight.
On the first day of December, 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 18:04 +0530.

Sunshine

The average sunshine in December 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 unprotected exposure to Sun's UV rays for the average person.
Note: In December, the maximum UV index of 7 translates into these guidelines:
Guard against overexposure. Protection from sun-induced harm is essential. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.