December weather forecast
Rathkarawwa, Sri Lanka

The first month of the winter, December, is also a moderately hot month in Rathkarawwa, Sri Lanka, with an average temperature fluctuating between 29°C (84.2°F) and 24.5°C (76.1°F).

Temperature

December is the month when Rathkarawwa experiences its coldest temperatures, averaging a high of 29°C (84.2°F) and a low of 24.5°C (76.1°F).

Heat index

December's average heat index is evaluated at a sweltering 35°C (95°F). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.
Observations indicate that the heat index values are for shady locations with light wind. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'real feel' or 'felt air temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. 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. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

November and December, with an average relative humidity of 79%, are the most humid months.

Rainfall

In Rathkarawwa, Sri Lanka, in December, during 20.1 rainfall days, 131mm (5.16") of precipitation is typically accumulated. Throughout the year, in Rathkarawwa, Sri Lanka, there are 192.9 rainfall days, and 942mm (37.09") of precipitation is accumulated.

Daylight

December has the shortest days of the year in Rathkarawwa, with an average of 11h and 42min of daylight.
On the first day of the month, sunrise is at 06:02 and sunset at 17:48. On the last day of December, in Rathkarawwa, sunrise is at 06:17 and sunset at 18:01 +0530.

Sunshine

The month with the least sunshine in Rathkarawwa is December, with an average of 6.6h of sunshine.

UV index

The months with the highest UV index are January through September, November and December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the average person.
Note: An average UV index of 7 in December transforms into this advice:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.