December weather forecast
Ratnapura, Sri Lanka

Ratnapura concludes the weather cycle with December, offering some relief from the high precipitation rates of previous months. Boasting a moderate temperature range between 28.4°C (83.1°F) high and 19.9°C (67.8°F) low, along with a mild wind speed of 4.3km/h (2.7mph), adaptation to December's weather comes naturally. As it bids farewell to the year, Ratnapura experiences less rainfall, recording a significant drop to 209mm (8.23"), indicating the start of a new weather cycle.

Temperature

Ratnapura measures an average high-temperature of a still warm 28.4°C (83.1°F) in December, nearly consistent with the preceding month. Ratnapura's temperature drops to an average low of 19.9°C (67.8°F) during the nights of December.

Heat index

The average heat index in December is evaluated at a hot 34°C (93.2°F). Take more safety measures, heat exhaustion and heat cramps are potential outcomes. Persistent activity might lead to heatstroke.
One should be cognizant that the heat index values are tailored for shaded spots and mild winds. 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 'felt air temperature', is found by incorporating humidity levels into the air temperature measurement. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.

Humidity

In December, the average relative humidity is 85%.

Rainfall

In Ratnapura, Sri Lanka, during December, the rain falls for 25.6 days and regularly aggregates up to 209mm (8.23") of precipitation. In Ratnapura, Sri Lanka, during the entire year, the rain falls for 317.3 days and collects up to 2422mm (95.35") of precipitation.

Daylight

December has the shortest days of the year, with an average of 11h and 42min of daylight.
On the first day of the month, sunrise is at 06:04 and sunset at 17:50. On the last day of December, in Ratnapura, sunrise is at 06:19 and sunset at 18:03 +0530.

Sunshine

The month with the least sunshine in Ratnapura is December, with an average of 6h of sunshine.

UV index

January through August, November and December, with an average maximum UV index of 6, are months with the highest UV index in Ratnapura. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.
Note: In December, a daily UV index of 6 turns into the following recommendations:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.