December weather forecast
Comacarán, El Salvador

The first month of the winter, December, is also a hot month in Comacarán, El Salvador, with an average temperature varying between 32°C (89.6°F) and 20.1°C (68.2°F).

Temperature

December's onset sees an average high-temperature of a still tropical 32°C (89.6°F), exhibiting a slight fluctuation from the previous month. In December, in Comacarán, the average low-temperature is a pleasant 20.1°C (68.2°F).

Heat index

Throughout December, the heat index is estimated at a fiery hot 39°C (102.2°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is a metric representing the sensation of warmth when air temperature and moisture come together. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. 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. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.

Humidity

In Comacarán, the average relative humidity in December is 65%.

Rainfall

In Comacarán, El Salvador, in December, it is raining for 4.1 days, with typically 5mm (0.2") of accumulated precipitation. In Comacarán, during the entire year, the rain falls for 188.2 days and collects up to 954mm (37.56") of precipitation.

Daylight

The month with the shortest days is December, with an average of 11h and 18min of daylight.
On the first day of December in Comacarán, sunrise is at 06:00 and sunset at 17:23. On the last day of the month, sunrise is at 06:15 and sunset at 17:35 CST.

Sunshine

The month with the least sunshine is December, with an average of 7.6h of sunshine.

UV index

The months with the highest UV index in Comacarán are January through August, November and December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum UV index of 7 during December leads to these instructions:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.