December weather forecast
Kottawa, Sri Lanka

The first month of the winter, December, is also a moderately hot month in Kottawa, Sri Lanka, with an average temperature ranging between max 29.7°C (85.5°F) and min 24.1°C (75.4°F).

Temperature

The introduction of December sees an average high-temperature of a warm 29.7°C (85.5°F), hardly deviating from November. Kottawa throughout December, experiences an average nighttime temperature of 24.1°C (75.4°F).

Heat index

In December, the average heat index is appraised at a sweltering 36°C (96.8°F). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.
Be advised, the heat index considers values for conditions in shade and with a light breeze. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. When there is an excess of moisture in the atmosphere, the efficiency of the evaporation process is lessened, leading to less efficient body cooling and a sensation of overheating. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.

Humidity

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

Rainfall

In Kottawa, in December, during 19.9 rainfall days, 124mm (4.88") of precipitation is typically accumulated. In Kottawa, during the entire year, the rain falls for 272.3 days and collects up to 2039mm (80.28") of precipitation.

Daylight

The month with the shortest days is December, with an average of 11h and 42min of daylight.
On the first day of December in Kottawa, 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

In Kottawa, the average sunshine in December is 7h.

UV index

January through April, July, September, November and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The daily high UV index of 7 during December translates into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.