May weather forecast
San Rafael Obrajuelo, El Salvador

The last month of the spring, May, is also a hot month in San Rafael Obrajuelo, El Salvador, with an average temperature ranging between max 31.8°C (89.2°F) and min 23.5°C (74.3°F).

Temperature

The onset of May brings with it an average high-temperature of a still hot 31.8°C (89.2°F), showing a negligible variation from the month before. Throughout May, San Rafael Obrajuelo encounters an average temperature drop to a moderately hot 23.5°C (74.3°F).

Heat index

The average heat index in May is calculated to be a scorching 42°C (107.6°F). Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.
It is essential to grasp that the heat index's numbers are for shade and light wind settings. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', shows a temperature sensation when both heat and moisture conditions are combined. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. 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 especially crucial for babies and toddlers. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

The average relative humidity in May in San Rafael Obrajuelo is 76%.

Rainfall

In San Rafael Obrajuelo, during May, the rain falls for 28.7 days and regularly aggregates up to 181mm (7.13") of precipitation. Throughout the year, in San Rafael Obrajuelo, El Salvador, there are 216.4 rainfall days, and 1164mm (45.83") of precipitation is accumulated.

Daylight

The average length of the day in May in San Rafael Obrajuelo is 12h and 46min.
On the first day of May, sunrise is at 05:33 and sunset at 18:11. On the last day of the month, sunrise is at 05:27 and sunset at 18:19 CST.

Sunshine

The average sunshine in May in San Rafael Obrajuelo is 10.4h.

UV index

The months with the highest UV index in San Rafael Obrajuelo are January through July and December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the average person.
Note: In May, a regular UV index of 7 translates into these guidelines:
Prevent overexposure. Protection from the sun's harmful effects is needed. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. A hat with a broad brim is indispensable, filtering out up to half of UV rays.