December weather forecast
Bollegala, Sri Lanka

December, the first month of the winter in Bollegala, is still a warm month, with an average temperature varying between 29.9°C (85.8°F) and 23.7°C (74.7°F).

Temperature

The arrival of December brings an average high-temperature of a warm 29.9°C (85.8°F), closely following the temperature pattern of November. The low-temperature in Bollegala averages to 23.7°C (74.7°F) during the nights of December.

Heat index

For most parts of December, the heat index is evaluated at a fiery hot 37°C (98.6°F). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.
The standards for the heat index are set for locations in shade and under light breezes. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
The physiological way the human body responds to excessive heat is by inducing perspiration, using sweat evaporation as a cooling mechanism. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

The average relative humidity in December is 79%.

Rainfall

In December, in Bollegala, the rain falls for 21.1 days. Throughout December, 148mm (5.83") of precipitation is accumulated. Throughout the year, in Bollegala, there are 289.4 rainfall days, and 2262mm (89.06") 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 06:06 and sunset at 17:51. On the last day of the month, sunrise is at 06:21 and sunset at 18:05 +0530.

Sunshine

In Bollegala, the average sunshine in December is 6.9h.

UV index

January through April, July, September, November and December, with an average maximum UV index of 7, are months with the highest UV index in Bollegala. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: A maximum UV index of 7 in December translates into the following recommendations:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.