December weather forecast
Hewagama, Sri Lanka

December, the first month of the winter in Hewagama, is also a moderately hot month, with an average temperature varying between 29.9°C (85.8°F) and 23.7°C (74.7°F).

Temperature

The arrival of December sees a recorded average high-temperature of a warm 29.9°C (85.8°F), showing little divergence from the previous month's conditions. Hewagama experiences a mean temperature of 23.7°C (74.7°F) during December nights.

Heat index

December's mean heat index is computed to be a sweltering 37°C (98.6°F). Heightened safety actions are necessary, heat cramps and heat exhaustion are probable. Persistent activity may lead to heatstroke.
In reference to the heat index, it's for places in shade and with a slight wind. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. 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. Overheating dangers loom when the body's heat release mechanisms are overshadowed by excessive gain.

Humidity

In Hewagama, Sri Lanka, the average relative humidity in December is 79%.

Rainfall

In Hewagama, Sri Lanka, in December, it is raining for 21.1 days, with typically 148mm (5.83") of accumulated precipitation. In Hewagama, during the entire year, the rain falls for 289.4 days and collects up to 2262mm (89.06") of precipitation.

Daylight

The month with the shortest days in Hewagama, Sri Lanka, is December, with an average of 11h and 42min of daylight.
On the first day of December in Hewagama, 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 Hewagama, Sri Lanka, the average sunshine in December is 6.9h.

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 in Hewagama. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum UV index, 7 during December, leads to the following recommendations:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.