December weather forecast
Periyamulla, Sri Lanka

December, the first month of the winter in Periyamulla, is also a moderately hot month, with an average temperature varying between 29.9°C (85.8°F) and 23.7°C (74.7°F).

Temperature

Periyamulla experiences a recorded average high-temperature of a moderately hot 29.9°C (85.8°F) in December, closely aligned with November's 30.2°C (86.4°F). During December, the average low-temperature is 23.7°C (74.7°F).

Heat index

For most parts of December, the heat index is estimated at a fiery hot 37°C (98.6°F). Greater preventive actions are needed, heat exhaustion and heat cramps are likely. Persistent activity could provoke heatstroke.
Heat index evaluations are typically in the context of light winds and shaded environments. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', marries air temperature and humidity to produce a value illustrating perceived warmth. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly meaningful for babies and toddlers. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.

Humidity

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

Rainfall

In Periyamulla, in December, it is raining for 20.3 days, with typically 139mm (5.47") of accumulated precipitation. In Periyamulla, during the entire year, the rain falls for 265.4 days and collects up to 1744mm (68.66") of precipitation.

Daylight

With an average of 11h and 42min of daylight, December has the shortest days of the year in Periyamulla.
On the first day of December, sunrise is at 06:07 and sunset at 17:51. On the last day of the month, sunrise is at 06:22 and sunset at 18:05 +0530.

Sunshine

In December, the average sunshine in Periyamulla 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 estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 7 in December interprets into the following advice:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. 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. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.