May weather forecast
Chalchuapa, El Salvador

Changing its course, May casts its reign with ceaseless showers and humidity in Chalchuapa. While the temperature settles in a comfortable range, the town receives the highest rainfall of the year, totaling 198mm (7.8"). Compared to April, the persistent showers and wet days prevail, setting a vastly different mood from the preceding sun-filled months. Nonetheless, the scenery turns particularly vibrant, being a perfect backdrop for nature lovers.

Temperature

With the onset of May, Chalchuapa's average high-temperature clocks in at a still hot 31.1°C (88°F), showing a minor fluctuation from the previous month. In Chalchuapa, the May nights cool down to an average low of 20.7°C (69.3°F).

Heat index

The heat index value for May is computed to be an extremely hot 40°C (104°F). More preventive actions are needed, risk of heat exhaustion and heat cramps is significant. Prolonged activity may trigger heatstroke.
Realize that the values for the heat index are set for shaded places and light winds. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', combines both the air temperature and the humidity level to give a perceived human temperature. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
Sweat evaporation, driven by perspiration, is the method the human body uses to rid itself of excessive warmth. An increase in relative humidity disrupts body cooling by slowing the evaporation rate, thereby reducing the rate at which the body cools and amplifying the sense of heat. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In Chalchuapa, the average relative humidity in May is 77%.

Rainfall

May is the month with the most rainfall. Rain falls for 23.7 days and accumulates 198mm (7.8") of precipitation.

Daylight

In Chalchuapa, El Salvador, the average length of the day in May is 12h and 47min.
On the first day of the month, sunrise is at 05:36 and sunset at 18:15. On the last day of May, sunrise is at 05:29 and sunset at 18:23 CST.

Sunshine

In May, the average sunshine is 10.3h.

UV index

The months with the highest UV index in Chalchuapa are January through August, October through December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: In May, the average maximum UV index of 6 translates into the following recommendations:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.