December weather forecast
Nilambur, India

The first month of the winter, December, is still a hot month in Nilambur, India, with an average temperature varying between 20.4°C (68.7°F) and 32.5°C (90.5°F).

Temperature

The advent of December sees the average high-temperature at a still tropical 32.5°C (90.5°F), subtly shifted from November's 31.7°C (89.1°F). December nights in Nilambur present a stark temperature decrease to a pleasant 20.4°C (68.7°F).

Heat index

The heat index in December is appraised at an extremely hot 42°C (107.6°F). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.
Always consider that heat index estimations are for light winds and places in the shade. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
The natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. With an abundance of moisture present in the air, the process of evaporation becomes less effective, and the body fails to cool down as it should, leading to the sensation of overheating. Rising body temperatures due to excess heat retention could signify impending heat disorders.

Humidity

The average relative humidity in December in Nilambur, India, is 71%.

Rainfall

In Nilambur, during December, the rain falls for 13.1 days and regularly aggregates up to 38mm (1.5") of precipitation. In Nilambur, during the entire year, the rain falls for 240 days and collects up to 1446mm (56.93") of precipitation.

Daylight

December has the shortest days of the year in Nilambur, with an average of 11h and 30min of daylight.
On the first day of the month, sunrise is at 6:28 am and sunset at 5:59 pm. On the last day of December, in Nilambur, sunrise is at 6:43 am and sunset at 6:12 pm IST.

Sunshine

In Nilambur, the average sunshine in December is 9.2h.

UV index

May through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: The UV index of 6 during December translates into the following guidance:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. A hat with a broad brim is indispensable, filtering out up to half of UV rays.