May weather forecastSan Esteban, Guatemala

Weather in May

The last month of the spring, May, is another tropical month in San Esteban, Guatemala, with an average temperature fluctuating between 20.2°C (68.4°F) and 31.6°C (88.9°F).

Temperature

San Esteban observes an average high-temperature of a still tropical 31.6°C (88.9°F) in May, barely different from 32.3°C (90.1°F) in April. Throughout May in San Esteban, a steady low-temperature average of 20.2°C (68.4°F) is noted.

Heat index

The heat index value during May is calculated to be a blistering 40°C (104°F). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
It is crucial to understand that heat index figures are for shade and gentle wind conditions. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.

Humidity

The average relative humidity in May is 73%.

Rainfall

In San Esteban, during May, the rain falls for 21.6 days and regularly aggregates up to 97mm (3.82") of precipitation. In San Esteban, during the entire year, the rain falls for 194.5 days and collects up to 669mm (26.34") of precipitation.

Daylight

In May, the average length of the day in San Esteban is 12h and 49min.
On the first day of May, sunrise is at 05:34 and sunset at 18:15. On the last day of the month, sunrise is at 05:27 and sunset at 18:24 CST.

Sunshine

The average sunshine in May is 10.5h.

UV index

In May, the average daily maximum UV index in San Esteban is 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: In May, the maximum UV index of 6 suggests this advice:
Ward off overexposure. Defence against solar harm is crucial. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.