December weather forecast
Soyapango, El Salvador

December holds the distinction of being the driest month, with rainfall dropping to a mere 6mm (0.24"). The city's weather becomes noticeably cooler, complementing the festive season of Christmas and New Year celebrations. While the decrease in daylight hours and temperature marks the onset of winter, the weather in Soyapango remains generally comfortable, wrapping up the year's weather patterns fittingly.

Temperature

Soyapango observes an average high-temperature of a still hot 30.8°C (87.4°F) in December, barely different from 30.3°C (86.5°F) in November. Nighttime temperatures consistently average an enjoyable 19.1°C (66.4°F) during December.

Heat index

December's mean heat index is calculated to be a very hot 37°C (98.6°F). Implement more preventive measures, heat cramps and heat exhaustion are probable. Heatstroke might result from extended activity.
Factoring in the heat index, values are geared towards shaded areas with light breezes. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', offers an insight into how hot it feels when we factor in moisture content. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.

Humidity

The average relative humidity in December is 69%.

Rainfall

In December, the rain falls for 2.8 days. Throughout December, 6mm (0.24") of precipitation is accumulated. Throughout the year, in Soyapango, there are 196.7 rainfall days, and 1216mm (47.87") of precipitation is accumulated.

Daylight

With an average of 11h and 18min of daylight, December has the shortest days of the year.
On the first day of December in Soyapango, sunrise is at 06:04 and sunset at 17:27. On the last day of the month, sunrise is at 06:19 and sunset at 17:39 CST.

Sunshine

The months with the least sunshine in Soyapango, El Salvador, are January and December, with an average of 7.7h of sunshine.

UV index

The months with the lowest UV index in Soyapango are May through December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The daily maximum UV index of 6 in December interprets into the following advice:
Guard oneself from overexposure. Defence against sun injury is vital. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.