December weather forecast
Devinuwara, Sri Lanka

December, the first month of the winter in Devinuwara, is still a warm month, with an average temperature varying between 29.9°C (85.8°F) and 23.8°C (74.8°F).

Temperature

Devinuwara's December showcases an average high-temperature of a still warm 29.9°C (85.8°F), hardly distinct from November's 29.8°C (85.6°F). Devinuwara's nighttime temperature in December drops to an average of 23.8°C (74.8°F).

Heat index

For December, the heat index is appraised at a torrid 37°C (98.6°F). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
Heat index evaluations are typically in the context of light winds and shaded environments. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', determines the feeling of heat when you account for the relative humidity. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. 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 especially vital to 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 natural method the human body uses to remove excess heat is by perspiring and letting sweat evaporate. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

In December, the average relative humidity in Devinuwara is 80%.

Rainfall

In Devinuwara, during December, the rain falls for 17.5 days and regularly aggregates up to 48mm (1.89") of precipitation. In Devinuwara, during the entire year, the rain falls for 180 days and collects up to 509mm (20.04") of precipitation.

Daylight

The month with the shortest days in Devinuwara 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 are January through December, with an average maximum UV index of 7. The months with the lowest UV index in Devinuwara, Sri Lanka, are January through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: During December, 7 as the daily maximum UV index converts into the following advice:
Prevent overexposure. Protection from the sun's harmful effects is needed. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.