December weather forecast
Guatajiagua, El Salvador

December, the first month of the winter in Guatajiagua, is still a tropical month, with temperature in the range of an average low of 20.1°C (68.2°F) and an average high of 32°C (89.6°F).

Temperature

The onset of December notes an average high-temperature of a still hot 32°C (89.6°F), subtly shifted from November's 31.5°C (88.7°F). Guatajiagua experiences a mean temperature of 20.1°C (68.2°F) during December nights.

Heat index

The heat index value during December is calculated to be a torrid 39°C (102.2°F). Adopt extra safety steps, risk of heat exhaustion and heat cramps is notable. Sustained activity might cause heatstroke.
Records show heat index calculations are tailored for shaded regions and mild winds. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
The physiological way the human body responds to excessive heat is by inducing perspiration, using sweat evaporation as a cooling mechanism. Excessive relative humidity disturbs the body's typical cooling process by reducing evaporation, leading to a decrease in body cooling rate and an increase in the sensation of warmth. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

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

Rainfall

In Guatajiagua, in December, it is raining for 4.1 days, with typically 5mm (0.2") of accumulated precipitation. In Guatajiagua, 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 the month, sunrise is at 06:00 and sunset at 17:23. On the last day of December, in Guatajiagua, sunrise is at 06:16 and sunset at 17:36 CST.

Sunshine

December has the least sunshine of the year in Guatajiagua, with an average of 7.6h of sunshine.

UV index

January through August, November and December, with an average maximum UV index of 7, are months with the highest UV index in Guatajiagua. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: In December, an average UV index of 7 transforms into the following instructions:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.