May weather forecast
Rio Sono, Brazil

The last month of the autumn, May, is also a hot month in Rio Sono, Brazil, with an average temperature varying between 30.4°C (86.7°F) and 21.4°C (70.5°F).

Temperature

With May's advent, Rio Sono sees an average high-temperature of a still tropical 30.4°C (86.7°F), subtly shifted from April's 30.3°C (86.5°F). Rio Sono, during the month of May, experiences an average low-temperature of 21.4°C (70.5°F).

Heat index

The heat index in May is evaluated at a fiery hot 38°C (100.4°F). Incorporate additional preventive steps, heat exhaustion and heat cramps are possible. Long-lasting activity may cause heatstroke.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', reflects the feeling of heat when considering both air temperature and humidity. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. Elevated relative humidity disrupts typical body cooling by reducing the evaporation rate, consequently decreasing the body's cooling rate and enhancing the feeling of heat. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.

Humidity

The average relative humidity in May is 77%.

Rainfall

In Rio Sono, in May, it is raining for 15.3 days, with typically 44mm (1.73") of accumulated precipitation. Throughout the year, in Rio Sono, there are 198 rainfall days, and 907mm (35.71") of precipitation is accumulated.

Daylight

In May, the average length of the day in Rio Sono is 11h and 41min.
On the first day of the month, sunrise is at 06:15 and sunset at 18:01. On the last day of May, sunrise is at 06:20 and sunset at 17:57 -03.

Sunshine

With an average of 7.3h of sunshine, May has the least sunshine of the year.

UV index

February through May and December, with an average maximum UV index of 6, are months with the lowest UV index in Rio Sono. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index of 6 in May converts into the following recommendations:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.