May weather forecast
Altamira, Brazil

May, the last month of the autumn in Altamira, is a hot month, with an average temperature varying between 30.6°C (87.1°F) and 22.2°C (72°F).

Temperature

With the onset of May, Altamira's average high-temperature clocks in at a tropical 30.6°C (87.1°F), showing a minor fluctuation from the previous month. Altamira anticipates an average minimum temperature of 22.2°C (72°F) in the month of May.

Heat index

The heat index for May is evaluated at a blisteringly hot 42°C (107.6°F). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. 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 'felt air temperature' or 'real feel', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

The average relative humidity in May in Altamira, Brazil, is 88%.

Rainfall

In Altamira, Brazil, in May, it is raining for 27.1 days, with typically 155mm (6.1") of accumulated precipitation. Throughout the year, there are 260.4 rainfall days, and 1317mm (51.85") of precipitation is accumulated.

Daylight

The average length of the day in May is 11h and 58min.
On the first day of the month, sunrise is at 06:25 and sunset at 18:25. On the last day of May, sunrise is at 06:28 and sunset at 18:25 -03.

Sunshine

In Altamira, Brazil, the average sunshine in May is 7.1h.

UV index

January through May, with an average maximum UV index of 6, are months with the lowest UV index in Altamira. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: The daily high UV index of 6 in May translates into this advice:
Resist extreme sun exposure. Guarding against solar 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. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.