December weather forecast
Divulapitiya, Sri Lanka

By December, Divulapitiya manages to maintain moderate conditions with little variation in temperature and a decrease in rainfall. The weather pivots to a more standard profile, with rainfall further decreasing to 139mm (5.47"), leading to more sunny days on the horizon. The decreased rainfall coupled with the consistent sunlight promises clear skies for more significant parts of December. Enshrining the true essence of a tropical climate, December provides a unique blend of warm sunny days with occasional rainfall. Wind speed remains fairly consistent, keeping the weather delightful as Christmas and the New Year approach.

Temperature

The advent of December brings an average high-temperature of a moderately hot 29.9°C (85.8°F), almost identical to the preceding month. Throughout December, an average low-temperature of 23.7°C (74.7°F) is experienced.

Heat index

For most parts of December, the heat index is calculated to be a sweltering 37°C (98.6°F). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', ties air temperature with relative humidity to produce the perceived temperature sensation. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

The average relative humidity in December is 79%.

Rainfall

In December, the rain falls for 20.3 days. Throughout December, 139mm (5.47") of precipitation is accumulated. Throughout the year, 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 the month, sunrise is at 06:07 and sunset at 17:51. On the last day of December, sunrise is at 06:21 and sunset at 18:04 +0530.

Sunshine

In December, the average sunshine is 7h.

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. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 7 in December converts into the following recommendations:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.