December weather forecast
Thrissur, India

December, the first month of the winter in Thrissur, is still a hot month, with an average temperature varying between 31.5°C (88.7°F) and 22.4°C (72.3°F).

Temperature

Thrissur observes an average high-temperature of a still tropical 31.5°C (88.7°F) in December, barely different from 30.9°C (87.6°F) in November. An average low-temperature of 22.4°C (72.3°F) is expected during December.

Heat index

The average heat index in December is estimated at a blisteringly hot 40°C (104°F). Exercise extra preventive actions, heat cramps and heat exhaustion are plausible. Continuous activity could result in heatstroke.
Observations indicate that the heat index values are for shady locations with light wind. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
Sweat evaporation plays a crucial role in cooling the human body, a process enabled by perspiration. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

In December, the average relative humidity is 72%.

Rainfall

In December, in Thrissur, the rain falls for 12.5 days. Throughout December, 41mm (1.61") of precipitation is accumulated. In Thrissur, during the entire year, the rain falls for 252.6 days and collects up to 2037mm (80.2") of precipitation.

Daylight

December has the shortest days of the year, with an average of 11h and 30min of daylight.
On the first day of December, sunrise is at 6:27 am and sunset at 6:00 pm. On the last day of the month, sunrise is at 6:42 am and sunset at 6:13 pm IST.

Sunshine

The average sunshine in December in Thrissur is 9.2h.

UV index

January through April, November and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: A maximum daily UV index of 7 during December morphs into the following directions:
Deflect overexposure. Sun protection is a necessity. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.