August weather forecast
San Marcos, El Salvador

August follows the consistent rainfall trend seen in July with a slight increase in the rainfall to 161mm (6.34") over nearly 25 days. The weather remains quite warm, similar to what July has to offer. Despite the consistent rain, average daylight hours of approximately 12.6 hours provide considerable time for daily activities. While the rain persists, cloudy days take precedence over clear sunny days, marked by 36% cloud cover. High humidity placing around 79% characterize these wet months, giving August a generally muggy feel.

Temperature

The transition into August is marked with an average high-temperature of a still tropical 31.6°C (88.9°F), showing an insignificant shift from July's 31.9°C (89.4°F). Throughout August, San Marcos records an average temperature of 21.4°C (70.5°F) at night.

Heat index

In August, the heat index is appraised at a scorching 43°C (109.4°F). On guard: Heat exhaustion and heat cramps are predicted. Heatstroke is a potential hazard with continuous physical effort.
Realize that the values for the heat index are set for shaded places and light winds. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', gauges the sensation of temperature factoring in the air's moisture content. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

In San Marcos, the average relative humidity in August is 79%.

Rainfall

In San Marcos, in August, during 24.6 rainfall days, 161mm (6.34") of precipitation is typically accumulated. In San Marcos, during the entire year, the rain falls for 196.7 days and collects up to 1216mm (47.87") of precipitation.

Daylight

In August, the average length of the day is 12h and 34min.
On the first day of the month, sunrise is at 05:41 and sunset at 18:24. On the last day of August, sunrise is at 05:45 and sunset at 18:08 CST.

Sunshine

In August, the average sunshine is 10.9h.

UV index

May through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the average person.
Note: The maximum UV index, 6 during August, leads to the following recommendations:
Resist overexposure. Safeguarding from solar damage is indispensable. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.