May weather forecast
Santa Ana, El Salvador

May sees a further enrichment of warmth and humidity in Santa Ana, with the city encountering its peak rainy season. The weather tends to sway from being warm in the daytime to cool in the evenings. Despite the surge in rainfall, the city still enjoys considerable daylight and sunshine hours. It's a welcome departure for those seeking a respite from the drier months. A staggering average rainfall of 198mm (7.8") marks this month as the wettest.

Temperature

May ushers in an average high-temperature of a still hot 31.1°C (88°F), aligning closely with the preceding month. During the month of May, Santa Ana experiences a steady low-temperature average of 20.7°C (69.3°F).

Heat index

Throughout May, the heat index is evaluated at a blistering 40°C (104°F). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.
Heat index guidelines indicate values are for light wind scenarios and shaded regions. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. 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. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
The natural method the human body uses to remove excess heat is by perspiring and letting sweat evaporate. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.

Humidity

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

Rainfall

May is the month with the most rainfall in Santa Ana, El Salvador. Rain falls for 23.7 days and accumulates 198mm (7.8") of precipitation.

Daylight

In Santa Ana, the average length of the day in May is 12h and 47min.
On the first day of the month, sunrise is at 05:35 and sunset at 18:14. On the last day of May, sunrise is at 05:29 and sunset at 18:23 CST.

Sunshine

In Santa Ana, the average sunshine in May is 10.3h.

UV index

The months with the highest UV index in Santa Ana, El Salvador, are January through August, October through December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the average person.
Note: An average maximum UV index of 6 in May leads to these recommendations:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Employ a wide-brim hat for potent defense against up to 50% of UV rays.