December weather forecast
Piyadigama, Sri Lanka

The first month of the winter, December, is still a warm month in Piyadigama, Sri Lanka, with temperature in the range of an average high of 29°C (84.2°F) and an average low of 24.9°C (76.8°F).

Temperature

Transitioning from November to December, Piyadigama observes an average high-temperature of a still moderately hot 29°C (84.2°F), differing subtly from the previous month. In Piyadigama, nights during December observe an average temperature decrease to a still warm 24.9°C (76.8°F).

Heat index

For most parts of December, the heat index is computed to be a torrid 35°C (95°F). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.
It is crucial to understand that heat index figures are for shade and gentle wind conditions. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', reflects the feeling of heat when considering both air temperature and humidity. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

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

Rainfall

In Piyadigama, Sri Lanka, in December, it is raining for 23.2 days, with typically 110mm (4.33") of accumulated precipitation. In Piyadigama, Sri Lanka, during the entire year, the rain falls for 292.5 days and collects up to 1797mm (70.75") of precipitation.

Daylight

December has the shortest days of the year, with an average of 11h and 48min of daylight.
On the first day of the month, sunrise is at 06:04 and sunset at 17:52. On the last day of December, sunrise is at 06:18 and sunset at 18:05 +0530.

Sunshine

With an average of 7.2h of sunshine, December has the least sunshine of the year.

UV index

The months with the highest UV index are January through April, July, August, October through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: During December, 7 as the daily maximum UV index converts into the following advice:
Guard oneself from overexposure. Defence against sun injury is vital. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.