December weather forecast
Kalalgoda, Sri Lanka

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

Temperature

Kalalgoda in December witnesses an average high-temperature of a warm 29.9°C (85.8°F), indicating a slight variation from November's 30.1°C (86.2°F). During the month of December, the temperature falls to an average of 23.7°C (74.7°F).

Heat index

The heat index value for December is calculated to be a torrid 37°C (98.6°F). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.
Consider that heat index readings are for situations in the shade and light wind. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is the outcome of merging air's temperature and its humidity metrics. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. 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 relevant to children. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.

Humidity

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

Rainfall

In December, the rain falls for 21.1 days. Throughout December, 148mm (5.83") of precipitation is accumulated. In Kalalgoda, during the entire year, the rain falls for 289.4 days and collects up to 2262mm (89.06") of precipitation.

Daylight

With an average of 11h and 42min of daylight, December has the shortest days of the year.
On the first day of December, 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 Kalalgoda, the average sunshine in December is 6.9h.

UV index

The months with the highest UV index are January through April, July, September, November and December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 7 during December translates into these guidelines:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.