May weather forecastRio Uaçá, Brazil

Weather in May

The last month of the spring, May, is also a moderately hot month in Rio Uaçá, Brazil, with an average temperature fluctuating between 28.8°C (83.8°F) and 22.3°C (72.1°F).

Temperature

With the transition into May, Rio Uaçá notes an average high-temperature of a still moderately hot 28.8°C (83.8°F), closely resembling April. Rio Uaçá's nighttime temperature in May falls to an average of 22.3°C (72.1°F).

Heat index

The heat index value for May is calculated to be a very hot 37°C (98.6°F). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.
Be aware that heat index ratings are designed for shaded locations and minor breezes. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly relevant to children. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Evaporating sweat, an outcome of perspiration, is key in assisting the human body to moderate its temperature. Relative humidity in excess curtails evaporation, therefore reducing heat dissipation from the body, leading to feelings of excess heat. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.

Humidity

May is the most humid month, with an average relative humidity of 91%.

Rainfall

May is the month with the most rainfall. Rain falls for 29.8 days and accumulates 215mm (8.46") of precipitation.

Daylight

The average length of the day in May is 12h and 17min.
On the first day of the month, sunrise is at 06:14 and sunset at 18:30. On the last day of May, sunrise is at 06:13 and sunset at 18:33 -03.

Sunshine

In Rio Uaçá, Brazil, the average sunshine in May is 5.6h.

UV index

January through June and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the ordinary person.
Note: In May, a regular UV index of 6 translates into these guidelines:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.