December weather forecast
San Esteban Catarina, El Salvador

December decorates San Esteban Catarina with the much-desired dry season. This month experiences further reduction in rainfall, and humidity levels plummet towards moderate. Bright sunshine bathes the city, and the wind adds a refreshing tweak to the changing atmosphere. The temperature typically stays within a range from 18.9°C (66°F) to 31.4°C (88.5°F), offering an enjoyably coherent climate. As December comes to a close, it brings the city full circle, preparing for the start of a fresh climatic cycle.

Temperature

San Esteban Catarina signifies an average high-temperature of a still hot 31.4°C (88.5°F) in December, closely mirroring the 30.9°C (87.6°F) of November. San Esteban Catarina records a marked divergence from the day's high temperatures, with nights in December averaging at a comfortable 18.9°C (66°F).

Heat index

December's mean heat index is computed to be a torrid 38°C (100.4°F). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.
One should be cognizant that the heat index values are tailored for shaded spots and mild winds. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', integrates the air's temperature and its humidity to showcase the felt temperature by people. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. 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. The body is at risk of dehydration and related complications when it fails to shed excessive heat.

Humidity

In San Esteban Catarina, the average relative humidity in December is 68%.

Rainfall

In San Esteban Catarina, in December, it is raining for 5.1 days, with typically 10mm (0.39") of accumulated precipitation. In San Esteban Catarina, during the entire year, the rain falls for 219.1 days and collects up to 1259mm (49.57") of precipitation.

Daylight

December has the shortest days of the year in San Esteban Catarina, with an average of 11h and 18min of daylight.
On the first day of the month, sunrise is at 06:03 and sunset at 17:25. On the last day of December, sunrise is at 06:18 and sunset at 17:38 CST.

Sunshine

With an average of 7.6h of sunshine, December has the least sunshine of the year in San Esteban Catarina, El Salvador.

UV index

The months with the lowest UV index in San Esteban Catarina are June, August through December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum daily UV index of 6 in December converts into the following recommendations:
Inhibit overexposure. Warding off sun damage is of utmost importance. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.