December weather forecast
Walana, Sri Lanka

December, the first month of the winter in Walana, is still a warm month, with an average temperature fluctuating between 24.4°C (75.9°F) and 29.7°C (85.5°F).

Temperature

Walana's average high-temperature in December sits at a still warm 29.7°C (85.5°F), showing little difference from the previous month. Walana usually reports an average low-temperature of 24.4°C (75.9°F) during the month of December.

Heat index

Throughout December, the heat index is appraised at a sweltering 36°C (96.8°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is found by incorporating humidity levels into the air temperature measurement. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.

Humidity

In December, the average relative humidity is 79%.

Rainfall

In Walana, in December, during 16.5 rainfall days, 93mm (3.66") of precipitation is typically accumulated. Throughout the year, there are 273.8 rainfall days, and 2059mm (81.06") of precipitation is accumulated.

Daylight

With an average of 11h and 42min of daylight, December has the shortest days of the year in Walana.
On the first day of the month, sunrise is at 06:06 and sunset at 17:52. On the last day of December, in Walana, sunrise is at 06:21 and sunset at 18:05 +0530.

Sunshine

The average sunshine in December is 7.1h.

UV index

January through April, July, September through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: A daily high UV index of 7 in December leads to these guidelines:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Stay sun-safe with clothing that is both closely woven and worn loosely.