December weather forecast
Lunawa, Sri Lanka

The first month of the winter, December, is still a warm month in Lunawa, Sri Lanka, with an average temperature varying between 29.7°C (85.5°F) and 24.4°C (75.9°F).

Temperature

The commencement of December records an average high-temperature of a still moderately hot 29.7°C (85.5°F), barely varying from November's 29.8°C (85.6°F). During December, Lunawa's temperature falls to a steady low-temperature average of 24.4°C (75.9°F).

Heat index

The heat index value during December is estimated at a fiery hot 36°C (96.8°F). Extra precautions are necessary, heat cramps and heat exhaustion are plausible outcomes. Extended activity could lead to heatstroke.
Understanding the heat index involves considering values for shaded locales with light wind. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', offers an insight into how hot it feels when we factor in moisture content. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
The physiological way the human body responds to excessive heat is by inducing perspiration, using sweat evaporation as a cooling mechanism. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

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

Rainfall

In December, in Lunawa, the rain falls for 16.5 days. Throughout December, 93mm (3.66") of precipitation is accumulated. Throughout the year, in Lunawa, Sri Lanka, there are 273.8 rainfall days, and 2059mm (81.06") of precipitation is accumulated.

Daylight

December has the shortest days of the year in Lunawa, Sri Lanka, with an average of 11h and 42min of daylight.
On the first day of December, 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 December, the average sunshine is 7.1h.

UV index

The months with the highest UV index are January through April, July, September through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum UV index of 7 during December leads to these instructions:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.