May weather forecast
Guaiúba, Brazil

May, the last month of the autumn in Guaiúba, is another tropical month, with an average temperature fluctuating between 23.4°C (74.1°F) and 30.5°C (86.9°F).

Temperature

May's presence records an average high-temperature of a still tropical 30.5°C (86.9°F), closely mirroring April's climate. In May, the recorded average low-temperature in Guaiúba is a warm 23.4°C (74.1°F).

Heat index

The average heat index in May is evaluated at a sweltering 39°C (102.2°F). Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.
Heat index readings emphasize conditions of light breezes and shaded spots. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

In May, the average relative humidity in Guaiúba is 80%.

Rainfall

In Guaiúba, in May, it is raining for 20.6 days, with typically 70mm (2.76") of accumulated precipitation. In Guaiúba, during the entire year, the rain falls for 183.1 days and collects up to 511mm (20.12") of precipitation.

Daylight

In Guaiúba, the average length of the day in May is 11h and 56min.
On the first day of the month, sunrise is at 05:32 and sunset at 17:30. On the last day of May, in Guaiúba, sunrise is at 05:35 and sunset at 17:29 -03.

Sunshine

The average sunshine in May is 7.5h.

UV index

The months with the highest UV index are January through March, May through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: An average maximum UV index of 7 in May leads to these recommendations:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.