December weather forecast
Matara, Sri Lanka

In December, Matara, Sri Lanka, maintains high temperatures around 29.9°C (85.8°F). The city bids adieu to the year with lesser rainfall, promoting outdoor exploration and making it a desirable destination for holiday celebrations. The reliable sea and wind conditions bring a curtain down on the year with an assortment of activities to choose from, be it surfing, diving, or boat cruising. Despite a decrease in sunlight hours, the city remains bathed in a soft glow most of the day. December, with its appealing weather conditions, offers an ideal wrap-up to the year in Matara.

Temperature

December's presence in Matara marks an average high-temperature of a still warm 29.9°C (85.8°F), subtly varied from November's 29.8°C (85.6°F). Throughout the month of December, Matara witnesses an average low-temperature of 23.8°C (74.8°F).

Heat index

December's average heat index is estimated at a sweltering 37°C (98.6°F). Implement more preventive measures, heat cramps and heat exhaustion are probable. Heatstroke might result from extended activity.
Realize that the values for the heat index are set for shaded places and light winds. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', ties air temperature with relative humidity to produce the perceived temperature sensation. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
Perspiration, followed by sweat evaporation, is the human body's chief method to maintain a balanced temperature. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in December in Matara, Sri Lanka, is 80%.

Rainfall

In December, the rain falls for 17.5 days. Throughout December, 48mm (1.89") of precipitation is accumulated. Throughout the year, in Matara, Sri Lanka, there are 180 rainfall days, and 509mm (20.04") of precipitation is accumulated.

Sea temperature

In Matara, in December, the average water temperature is 28.1°C (82.6°F).
Note: For any water activity, the surface water temperatures in the range of 25°C (77°F) to 29°C (84.2°F) are deemed excellent and incredibly pleasant for longer durations.

Daylight

The month with the shortest days in Matara is December, with an average of 11h and 48min of daylight.
On the first day of the month, sunrise is at 06:02 and sunset at 17:50. On the last day of December, sunrise is at 06:17 and sunset at 18:04 +0530.

Sunshine

With an average of 6.9h of sunshine, December has the least sunshine of the year.

UV index

The months with the highest UV index in Matara are January through December, with an average maximum UV index of 7. The months with the lowest UV index in Matara are January through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In December, a daily UV index of 7 turns into the following recommendations:
Prevent overexposure. Protection from the sun's harmful effects is needed. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Alert! Sand and water increase UV exposure due to their reflective properties.