December weather forecast
Panchimalco, El Salvador

December brings the year rounding off with the coolest weather in Panchimalco, El Salvador. December's unique weather trait is its lowest average temperature in the year, dropping to 19.5°C (67.1°F). The weather becomes pleasantly cooler, marking a distinct shift from the preceding month of November. With minimal rainfall, abundant sunshine, and cooler temperatures, December captures a winter-like feel much appreciated by city-goers. Hence, December's cooler character and noticeable drop in temperature close out the year on a distinctive note, markedly different from the relatively warmer weather of November.

Temperature

In December, Panchimalco charts a high-temperature average of a still warm 29.9°C (85.8°F), remaining consistent with November. Panchimalco observes an average low-temperature of 19.5°C (67.1°F) during December nights.

Heat index

The heat index value during December is estimated at a fiery hot 35°C (95°F). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.
Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', marries air temperature and humidity to produce a value illustrating perceived warmth. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

In Panchimalco, the average relative humidity in December is 70%.

Rainfall

In Panchimalco, in December, during 2.3 rainfall days, 4mm (0.16") of precipitation is typically accumulated. In Panchimalco, during the entire year, the rain falls for 187 days and collects up to 1106mm (43.54") of precipitation.

Daylight

December has the shortest days of the year, with an average of 11h and 18min of daylight.
On the first day of December in Panchimalco, 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 17:40 CST.

Sunshine

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

UV index

January, May, June, August through December, with an average maximum UV index of 6, are months with the lowest UV index in Panchimalco. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum UV index, 6 during December, leads to the following recommendations:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. A hat with a broad brim is indispensable, filtering out up to half of UV rays.