May weather forecast
Caluco, El Salvador

The last month of the spring, May, is another tropical month in Caluco, El Salvador, with an average temperature varying between 30.4°C (86.7°F) and 23.3°C (73.9°F).

Temperature

The average high-temperature during May registers at a still tropical 30.4°C (86.7°F), maintaining a close resemblance to the previous month. In Caluco, May nights cool down to an average of 23.3°C (73.9°F).

Heat index

The heat index for May is computed to be a fiery hot 38°C (100.4°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Heat index determinations are made taking into account the shade and light air movements. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

In May, the average relative humidity is 76%.

Rainfall

In Caluco, during May, the rain falls for 22.9 days and regularly aggregates up to 151mm (5.94") of precipitation. In Caluco, during the entire year, the rain falls for 166.9 days and collects up to 832mm (32.76") of precipitation.

Daylight

The average length of the day in May is 12h and 46min.
On the first day of the month, sunrise is at 05:36 and sunset at 18:14. On the last day of May, in Caluco, sunrise is at 05:29 and sunset at 18:22 CST.

Sunshine

The average sunshine in May in Caluco is 10.9h.

UV index

The months with the highest UV index are January through May and July, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: The UV index of 7 in May translates into these instructions:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.