December weather forecast
Mount Lavinia, Sri Lanka

The first month of the winter, December, is also a moderately hot month in Mount Lavinia, Sri Lanka, with an average temperature fluctuating between 24.1°C (75.4°F) and 29.7°C (85.5°F).

Temperature

December's arrival shows an average high-temperature of a moderately hot 29.7°C (85.5°F), hardly different from the previous month. In December, Mount Lavinia reports a consistent average low-temperature of 24.1°C (75.4°F) during the nights.

Heat index

December's average heat index is appraised at a fiery hot 36°C (96.8°F). Undertake enhanced precautions, heat exhaustion and heat cramps are possible risks. Continuous activity could trigger heatstroke.
Always consider that heat index estimations are for light winds and places in the shade. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'feels like' or 'real feel', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. Elevated relative humidity disrupts typical body cooling by reducing the evaporation rate, consequently decreasing the body's cooling rate and enhancing the feeling of heat. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

In December, the average relative humidity in Mount Lavinia is 79%.

Rainfall

In Mount Lavinia, in December, it is raining for 22.4 days, with typically 156mm (6.14") of accumulated precipitation. In Mount Lavinia, Sri Lanka, during the entire year, the rain falls for 285.6 days and collects up to 2201mm (86.65") of precipitation.

Daylight

The month with the shortest days in Mount Lavinia is December, with an average of 11h and 42min of daylight.
On the first day of December in Mount Lavinia, sunrise is at 06:06 and sunset at 17:52. On the last day of the month, sunrise is at 06:21 and sunset at 18:05 +0530.

Sunshine

In Mount Lavinia, the average sunshine in December is 7h.

UV index

January through April, June, July, September, November and December, with an average maximum UV index of 7, are months with the highest UV index in Mount Lavinia. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the average person.
Note: A daily maximum UV index of 7 in December translates into the following instructions:
Prevent overexposure. Protection from the sun's harmful effects is needed. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.