May weather forecast
São Caetano de Odivelas, Brazil

The last month of the autumn, May, is also a moderately hot month in São Caetano de Odivelas, Brazil, with an average temperature varying between 29.5°C (85.1°F) and 24.5°C (76.1°F).

Temperature

The advent of May reveals an average high-temperature of a still moderately hot 29.5°C (85.1°F), showing minimal difference from the prior month. The nights of May cool down to an average low of 24.5°C (76.1°F), subtly lower than daytime highs.

Heat index

The heat index for May is evaluated at a very hot 38°C (100.4°F). Incorporate extra safety measures to avoid heat exhaustion and heat cramps. Continuous activity could provoke heatstroke.
Consider that heat index readings are for situations in the shade and light wind. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'real feel', joins air temperature with relative humidity to produce a temperature perception for humans. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. An elevated level of relative humidity hinders evaporation, leading to decreased heat elimination from the body, inducing a sensation of excess heat. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

The average relative humidity in May is 86%.

Rainfall

In São Caetano de Odivelas, in May, it is raining for 30.3 days, with typically 305mm (12.01") of accumulated precipitation. In São Caetano de Odivelas, Brazil, during the entire year, the rain falls for 315.6 days and collects up to 2313mm (91.06") of precipitation.

Sea temperature

January, May through August and November, with an average sea temperature of 28.8°C (83.8°F), are months with the warmest seawater in São Caetano de Odivelas.
Note: Surface water temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are seen as ideal and highly pleasant for extended enjoyment in all water activities.

Daylight

In São Caetano de Odivelas, the average length of the day in May is 12h and 5min.
On the first day of the month, sunrise is at 06:06 and sunset at 18:11. On the last day of May, sunrise is at 06:07 and sunset at 18:12 -03.

Sunshine

In São Caetano de Odivelas, the average sunshine in May is 7.7h.

UV index

The months with the lowest UV index are February through May, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for average individuals.
Note: A maximum high daily UV index of 6 during May translates into the following directions:
Shield from overexposure. Defense against sun-related harm is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Take note! Sand and water reflections strengthen the Sun's UV exposure.