December weather forecast
Potuwila, Sri Lanka

The first month of the winter, December, is also a moderately hot month in Potuwila, Sri Lanka, with temperature in the range of an average high of 29.7°C (85.5°F) and an average low of 24.4°C (75.9°F).

Temperature

Potuwila signifies an average high-temperature of a still moderately hot 29.7°C (85.5°F) in December, closely mirroring the 29.8°C (85.6°F) of November. During the December nights, an average temperature of 24.4°C (75.9°F) is observed.

Heat index

For most parts of December, the heat index is evaluated at a torrid 36°C (96.8°F). More preventive actions are needed, risk of heat exhaustion and heat cramps is significant. Prolonged activity may trigger heatstroke.
The metrics for the heat index are tailored for both shady environments and light winds. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a metric representing the sensation of warmth when air temperature and moisture come together. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

In December, the average relative humidity is 79%.

Rainfall

In Potuwila, in December, it is raining for 16.5 days, with typically 93mm (3.66") of accumulated precipitation. In Potuwila, Sri Lanka, during the entire year, the rain falls for 273.8 days and collects up to 2059mm (81.06") of precipitation.

Daylight

With an average of 11h and 48min of daylight, December has the shortest days of the year in Potuwila.
On the first day of December in Potuwila, sunrise is at 06:05 and sunset at 17:52. On the last day of the month, sunrise is at 06:20 and sunset at 18:05 +0530.

Sunshine

In December, the average sunshine in Potuwila is 7.1h.

UV index

The months with the highest UV index in Potuwila, Sri Lanka, are January through April, July, September through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum daily UV index of 7 in December interprets into the following recommendations:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.