May weather forecast
San Cristobal, Cuba

The last month of the spring, May, is a tropical month in San Cristobal, Cuba, with an average temperature fluctuating between 30.1°C (86.2°F) and 24.1°C (75.4°F).

Temperature

San Cristobal's average high-temperature marks a tropical 30.1°C (86.2°F) with the advent of May, closely mirroring that of the preceding month. During May, San Cristobal witnesses a consistent average low-temperature of 24.1°C (75.4°F).

Heat index

During May, the heat index is calculated to be a sweltering 36°C (96.8°F). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
Heat index determinations are made taking into account the shade and light air movements. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a composite of temperature and humidity figures to convey how warm it feels. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
Evaporating sweat, an outcome of perspiration, is key in assisting the human body to moderate its temperature. An elevated level of relative humidity hinders evaporation, leading to decreased heat elimination from the body, inducing a sensation of excess heat. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.

Humidity

In May, the average relative humidity is 74%.

Rainfall

In May, the rain falls for 17.7 days. Throughout May, 82mm (3.23") of precipitation is accumulated. In San Cristobal, during the entire year, the rain falls for 169.4 days and collects up to 650mm (25.59") of precipitation.

Daylight

The average length of the day in May in San Cristobal, Cuba, is 13h and 14min.
On the first day of the month, sunrise is at 06:58 and sunset at 19:59. On the last day of May, sunrise is at 06:46 and sunset at 20:13 CDT.

Sunshine

The months with the most sunshine in San Cristobal, Cuba, are May and July, with an average of 10.9h of sunshine.

UV index

March through October, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: The UV index of 7 in May translates into these instructions:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. 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. Opt for tightly woven and loose clothing to enhance protection from the Sun.