December weather forecast
Udawalawa, Sri Lanka

December, the first month of the winter in Udawalawa, is also a moderately hot month, with temperature in the range of an average high of 29°C (84.2°F) and an average low of 24.5°C (76.1°F).

Temperature

December, noted for its average high-temperature of 29°C (84.2°F) and an average low-temperature of 24.5°C (76.1°F), is considered the coldest month.

Heat index

December's mean heat index is computed to be a torrid 35°C (95°F). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.
It is important to note that the heat index values are for shaded areas and light wind scenarios. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values hold particular importance for children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

November and December, with an average relative humidity of 79%, are the most humid months in Udawalawa.

Rainfall

In Udawalawa, during December, the rain falls for 20.1 days and regularly aggregates up to 131mm (5.16") of precipitation. In Udawalawa, during the entire year, the rain falls for 192.9 days and collects up to 942mm (37.09") of precipitation.

Daylight

December has the shortest days of the year, with an average of 11h and 48min of daylight.
On the first day of the month, sunrise is at 06:02 and sunset at 17:49. On the last day of December, sunrise is at 06:17 and sunset at 18:02 +0530.

Sunshine

With an average of 6.6h of sunshine, December has the least sunshine of the year in Udawalawa.

UV index

The months with the highest UV index in Udawalawa are January through September, November and December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the average person.
Note: In December, the maximum UV index of 7 suggests these recommendations:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. During bright days, sunglasses that offer UVA and UVB defense are recommended.