April weather forecast
San Francisco Lempa, El Salvador

April, the same as March, in San Francisco Lempa, El Salvador, is another tropical spring month, with temperature in the range of an average low of 22.3°C (72.1°F) and an average high of 33.8°C (92.8°F).

Temperature

The arrival of April denotes a barely perceptible change in the average high-temperatures to a still tropical 33.8°C (92.8°F) from March's 34.1°C (93.4°F). Throughout April, an average low-temperature of 22.3°C (72.1°F) is experienced in San Francisco Lempa.

Heat index

April's mean heat index is appraised at a blistering 43°C (109.4°F). Be careful: Heat exhaustion and heat cramps are probable. Heatstroke may result from extended activity.
When assessing, remember that heat index measurements are for light winds and shaded spots. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', offers an insight into how hot it feels when we factor in moisture content. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are extremely significant for children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

In April, the average relative humidity in San Francisco Lempa is 64%.

Rainfall

In San Francisco Lempa, in April, it is raining for 14.1 days, with typically 36mm (1.42") of accumulated precipitation. Throughout the year, in San Francisco Lempa, there are 192.2 rainfall days, and 1062mm (41.81") of precipitation is accumulated.

Daylight

The average length of the day in April is 12h and 28min.
On the first day of the month, sunrise is at 05:51 and sunset at 18:08. On the last day of April, sunrise is at 05:34 and sunset at 18:12 CST.

Sunshine

April has the most sunshine of the year in San Francisco Lempa, with an average of 11.4h of sunshine.

UV index

The months with the highest UV index in San Francisco Lempa, El Salvador, are February through May, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: A daily maximum UV index of 7 in April translates into the following instructions:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.