December weather forecast
Mutur, Sri Lanka

The first month of the winter, December, is also a moderately hot month in Mutur, Sri Lanka, with an average temperature varying between 21.4°C (70.5°F) and 29.3°C (84.7°F).

Temperature

In Mutur, the coldest period comes during January and December, when the average high-temperature touches 29.3°C (84.7°F).

Heat index

For December, the heat index is evaluated at a very hot 37°C (98.6°F). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', binds temperature metrics with humidity values to give a sense of the actual warmth. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
Perspiring is a crucial mechanism for the human body, allowing it to release excessive warmth through evaporating sweat. Under conditions of high relative humidity, the rate of evaporation decreases. This results in the body retaining more heat than under conditions of dry air. When body heat isn't effectively managed, risks of dehydration and overheating amplify.

Humidity

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

Rainfall

In Mutur, during December, the rain falls for 22.9 days and regularly aggregates up to 127mm (5") of precipitation. In Mutur, during the entire year, the rain falls for 196.8 days and collects up to 943mm (37.13") of precipitation.

Daylight

The month with the shortest days in Mutur, Sri Lanka, is December, with an average of 11h and 36min of daylight.
On the first day of December in Mutur, sunrise is at 06:04 and sunset at 17:44. On the last day of the month, sunrise is at 06:18 and sunset at 17:57 +0530.

Sunshine

December has the least sunshine of the year, with an average of 4.9h of sunshine.

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 health hazard from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index of 6 during December translates into the following directions:
Take precautions against overexposure. Protection against sun damage is needed. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.