May weather forecastPrincesa Isabel, Brazil

Weather in May

May, the last month of the autumn in Princesa Isabel, is another warm month, with an average temperature fluctuating between 19°C (66.2°F) and 29.8°C (85.6°F).

Temperature

The transition into May marks the average high-temperature at a warm 29.8°C (85.6°F), differing minimally from April's 31°C (87.8°F). Throughout May, the average low-temperature in Princesa Isabel records at a comfortable 19°C (66.2°F).

Heat index

The heat index for May is evaluated at a very hot 36°C (96.8°F). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.
Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'feels like' or 'felt air temperature', takes into account both air temperature and humidity to illustrate what people actually feel. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. An increase in relative humidity disrupts body cooling by slowing the evaporation rate, thereby reducing the rate at which the body cools and amplifying the sense of heat. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

With an average relative humidity of 75%, May is the most humid month in Princesa Isabel.

Rainfall

In Princesa Isabel, during May, the rain falls for 14.6 days and regularly aggregates up to 48mm (1.89") of precipitation. Throughout the year, there are 140.8 rainfall days, and 430mm (16.93") of precipitation is accumulated.

Daylight

In Princesa Isabel, the average length of the day in May is 11h and 46min.
On the first day of the month, sunrise is at 05:33 and sunset at 17:24. On the last day of May, sunrise is at 05:38 and sunset at 17:20 -03.

Sunshine

In May, the average sunshine is 7.4h.

UV index

January, April through August, with an average maximum UV index of 6, are months with the lowest UV index in Princesa Isabel. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The UV index of 6 during May leads to these advisories:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. 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. Opt for tightly woven and loose clothing to enhance protection from the Sun.