May weather forecast
Barreirinhas, Brazil

The last month of the autumn, May, is a tropical month in Barreirinhas, Brazil, with temperature in the range of an average high of 30°C (86°F) and an average low of 25.4°C (77.7°F).

Temperature

April's transformation into May witnesses an average high-temperature of a hot 30°C (86°F), noting a minor change from the preceding month. Throughout May, Barreirinhas reports a steady low-temperature average of 25.4°C (77.7°F), slightly lower than its daytime counterpart.

Heat index

The heat index value during May is appraised at a fiery hot 38°C (100.4°F). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
In reference to the heat index, it's for places in shade and with a slight wind. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', melds the effects of warmth and moisture to generate a feeling of heat. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

March through May, with an average relative humidity of 81%, are the most humid months.

Rainfall

In May, the rain falls for 27 days. Throughout May, 174mm (6.85") of precipitation is accumulated. In Barreirinhas, during the entire year, the rain falls for 225.4 days and collects up to 1281mm (50.43") of precipitation.

Daylight

In May, the average length of the day in Barreirinhas, Brazil, is 11h and 59min.
On the first day of the month, sunrise is at 05:47 and sunset at 17:48. On the last day of May, sunrise is at 05:49 and sunset at 17:48 -03.

Sunshine

In May, the average sunshine is 8.6h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index in Barreirinhas. January through December, with an average maximum UV index of 7, are months with the lowest UV index in Barreirinhas. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The maximum UV index of 7 during May translates into these guidelines:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.