December weather forecast
Undurugoda, Sri Lanka

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

Temperature

December's arrival registers an average high-temperature of a still moderately hot 29.7°C (85.5°F), closely aligning with the temperature of the previous month. An average low-temperature of 24.4°C (75.9°F) is noted during the nights in December in Undurugoda.

Heat index

The average heat index in December is evaluated at a fiery hot 36°C (96.8°F). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.

Humidity

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

Rainfall

In Undurugoda, in December, it is raining for 16.5 days, with typically 93mm (3.66") of accumulated precipitation. Throughout the year, in Undurugoda, there are 273.8 rainfall days, and 2059mm (81.06") of precipitation is accumulated.

Daylight

With an average of 11h and 42min of daylight, December has the shortest days of the year in Undurugoda.
On the first day of December in Undurugoda, sunrise is at 06:06 and sunset at 17:51. On the last day of the month, sunrise is at 06:21 and sunset at 18:05 +0530.

Sunshine

The average sunshine in December is 7.1h.

UV index

January through April, July, September through December, with an average maximum UV index of 7, are months with the highest UV index in Undurugoda. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A maximum high daily UV index of 7 during December translates into the following directions:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Opt for tightly woven and loose clothing to enhance protection from the Sun.