May weather forecast
Guatemala City, Guatemala

Guatemala City encounters a major shift in weather during May, with the highest rainfall volume recorded at 129mm (5.08"). The significant precipitation is a reflection of the effusive wet season. The increase in rainfall is coupled with the highest humidity throughout the year. Temperature variations are insignificant compared to April. Extremely high ultraviolet radiation exists despite the reduction in hours of sunshine.

Temperature

Guatemala City's shift into May is marked by a subtle change to a still moderately hot 27.1°C (80.8°F) from April's 27.8°C (82°F) in temperature. Guatemala City observes an average low-temperature of 16.8°C (62.2°F) during May.

Heat index

The heat index value for May is calculated to be a tropical 30°C (86°F). Persistently participating in activities during exposure may lead to fatigue and induce heat cramps.
Realize that the values for the heat index are set for shaded places and light winds. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', reflects the blend of air temperature and relative humidity to give a temperature impression. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.

Humidity

The average relative humidity in May is 77.3%.

Rainfall

In Guatemala City, in May, during 12.4 rainfall days, 129mm (5.08") of precipitation is typically accumulated. In Guatemala City, during the entire year, the rain falls for 125.2 days and collects up to 1275mm (50.2") of precipitation.

Daylight

In May, the average length of the day in Guatemala City is 12h and 49min.
On the first day of the month, sunrise is at 05:38 and sunset at 18:19. On the last day of May, sunrise is at 05:31 and sunset at 18:27 CST.

Sunshine

In Guatemala City, Guatemala, the average sunshine in May is 5.9h.

UV index

February through October, with an average maximum UV index of 12, are months with the highest UV index. A UV Index value of 11, and more, symbolizes an excessive health risk from exposure to the Sun's UV rays for the ordinary person.
Note: A daily high UV index of 12 in May leads to these guidelines:
Take every vital safeguard, as unprotected skin and eyes may suffer burns rapidly. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Shield yourself from sunburn by using sunscreen of a minimum 30 SPF. This also limits the Sun's harmful effects on the immune system.