August weather forecast
San Francisco Lempa, El Salvador

The last month of the summer, August, is another hot month in San Francisco Lempa, El Salvador, with temperature in the range of an average high of 31.8°C (89.2°F) and an average low of 20.8°C (69.4°F).

Temperature

San Francisco Lempa observes an average high-temperature of a still tropical 31.8°C (89.2°F) in August, barely different from 32°C (89.6°F) in July. San Francisco Lempa temperatures generally rest at a low of 20.8°C (69.4°F) during the August nights.

Heat index

For most parts of August, the heat index is appraised at a scorching 43°C (109.4°F). Take caution: Heat exhaustion and heat cramps are probable. Heatstroke may be imminent with ongoing effort.
It is important to note that the heat index values are for shaded areas and light wind scenarios. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a metric representing the sensation of warmth when air temperature and moisture come together. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. Rising body temperatures due to excess heat retention could signify impending heat disorders.

Humidity

In August, the average relative humidity is 79%.

Rainfall

In San Francisco Lempa, in August, during 26.6 rainfall days, 144mm (5.67") of precipitation is typically accumulated. In San Francisco Lempa, during the entire year, the rain falls for 192.2 days and collects up to 1062mm (41.81") of precipitation.

Daylight

In San Francisco Lempa, the average length of the day in August is 12h and 35min.
On the first day of August, sunrise is at 05:40 and sunset at 18:24. On the last day of the month, sunrise is at 05:44 and sunset at 18:07 CST.

Sunshine

In San Francisco Lempa, the average sunshine in August is 10.6h.

UV index

January, June through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the ordinary person.
Note: In August, a daily UV index of 6 turns into the following recommendations:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.