December weather forecast
Dambulla, Sri Lanka

Closing the yearly weather cycle in Dambulla, December brings a further dip in both rainfall and temperatures. Rainfall drops to 127mm (5"), signalling the end of wetter months and the transition towards a drier season ahead. Alongside this, the lowering pressure to 1010.6mb provides a more relaxed atmospheric environment. Residents and visitors in Dambulla can expect cooler evenings paired with warm yet tolerable daytime temperatures. Hence, December offers a pleasing wrap-up to the weather conditions experienced throughout the year in the city.

Temperature

Lowest temperatures are observed in January and December, averaging a high-temperature of 29.3°C (84.7°F).

Heat index

The heat index value during December is estimated at a sweltering 37°C (98.6°F). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. An elevated level of relative humidity hinders evaporation, leading to decreased heat elimination from the body, inducing a sensation of excess heat. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

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

Rainfall

In Dambulla, in December, it is raining for 22.9 days, with typically 127mm (5") of accumulated precipitation. Throughout the year, in Dambulla, there are 196.8 rainfall days, and 943mm (37.13") of precipitation is accumulated.

Daylight

The month with the shortest days is December, with an average of 11h and 42min of daylight.
On the first day of the month, sunrise is at 06:05 and sunset at 17:47. On the last day of December, in Dambulla, sunrise is at 06:20 and sunset at 18:00 +0530.

Sunshine

With an average of 4.9h of sunshine, December has the least sunshine of the year in Dambulla.

UV index

The months with the lowest UV index are January, November and December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for average individuals.
Note: A maximum UV index of 6 in December translates into the following recommendations:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.