May weather forecast
Rio Real, Brazil

The last month of the autumn, May, is also a moderately hot month in Rio Real, Brazil, with an average temperature fluctuating between 20.6°C (69.1°F) and 29.3°C (84.7°F).

Temperature

Rio Real greets May with an average high-temperature of a moderately hot 29.3°C (84.7°F), marking a slight deviation from the preceding month. Throughout May in Rio Real, a steady low-temperature average of 20.6°C (69.1°F) is noted.

Heat index

Throughout May, the heat index is calculated to be a torrid 36°C (96.8°F). Implement more preventive measures, heat cramps and heat exhaustion are probable. Heatstroke might result from extended activity.
In terms of the heat index, values are set with light wind and shade conditions in mind. 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 'felt air temperature' or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. 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. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in May in Rio Real is 83%.

Rainfall

May is the month with the most rainfall in Rio Real. Rain falls for 20.2 days and accumulates 58mm (2.28") of precipitation.

Daylight

In Rio Real, the average length of the day in May is 11h and 35min.
On the first day of the month, sunrise is at 05:37 and sunset at 17:19. On the last day of May, sunrise is at 05:44 and sunset at 17:14 -03.

Sunshine

The month with the least sunshine in Rio Real is May, with an average of 5.1h of sunshine.

UV index

In May, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the average person.
Note: The UV index of 6 during May translates into the following guidance:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.