December weather forecast
Tissamaharama, Sri Lanka

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

Temperature

In Tissamaharama, December is the coldest month, with temperatures averaging a high of 29°C (84.2°F) and a low of 24.5°C (76.1°F).

Heat index

For most parts of December, the heat index is evaluated at a sweltering 35°C (95°F). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
Be aware that heat index ratings are designed for shaded locations and minor breezes. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'feels like', offers an insight into how hot it feels when we factor in moisture content. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
The body's innate mechanism to counteract overheating is through perspiration, as it leverages the cooling effects of sweat evaporation. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

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

Rainfall

In Tissamaharama, during December, the rain falls for 20.1 days and regularly aggregates up to 131mm (5.16") of precipitation. In Tissamaharama, Sri Lanka, during the entire year, the rain falls for 192.9 days and collects up to 942mm (37.09") of precipitation.

Daylight

December has the shortest days of the year in Tissamaharama, Sri Lanka, with an average of 11h and 48min of daylight.
On the first day of December in Tissamaharama, sunrise is at 06:00 and sunset at 17:47. On the last day of the month, sunrise is at 06:14 and sunset at 18:00 +0530.

Sunshine

With an average of 6.6h of sunshine, December has the least sunshine of the year.

UV index

January through September, November and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: A daily maximum UV index of 7 in December translates into the following instructions:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.