May weather forecast
Caicó, Brazil

The last month of the autumn, May, is also a hot month in Caicó, Brazil, with an average temperature varying between 22.3°C (72.1°F) and 32.5°C (90.5°F).

Temperature

In May, Caicó notes an average high-temperature of a still tropical 32.5°C (90.5°F), hardly different from the preceding month. During the month of May, an average temperature of 22.3°C (72.1°F) is noted during the nights in Caicó.

Heat index

During May, the heat index is evaluated at an extremely hot 42°C (107.6°F). Preventive measures are required to mitigate the risk of heat cramps and heat exhaustion. Continuous activity may precipitate heatstroke.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values hold particular importance for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
The body's innate mechanism to counteract overheating is through perspiration, as it leverages the cooling effects of sweat evaporation. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.

Humidity

April and May, with an average relative humidity of 70%, are the most humid months.

Rainfall

In Caicó, during May, the rain falls for 16.9 days and regularly aggregates up to 68mm (2.68") of precipitation. Throughout the year, in Caicó, there are 122.6 rainfall days, and 442mm (17.4") of precipitation is accumulated.

Daylight

The average length of the day in May is 11h and 49min.
On the first day of the month, sunrise is at 05:28 and sunset at 17:21. On the last day of May, sunrise is at 05:33 and sunset at 17:19 -03.

Sunshine

In Caicó, the average sunshine in May is 8.8h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index in Caicó. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: An average maximum UV index of 7 in May leads to these recommendations:
Fend off overexposure. Sun protection is vital. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.