May weather forecast
São Mateus do Maranhão, Brazil

May, the last month of the autumn in São Mateus do Maranhão, is a hot month, with an average temperature ranging between min 22.3°C (72.1°F) and max 30.2°C (86.4°F).

Temperature

As April transitions into May, São Mateus do Maranhão records an average high-temperature of a tropical 30.2°C (86.4°F), showing a gentle shift from the preceding month. An average temperature of 22.3°C (72.1°F) marks the nights in São Mateus do Maranhão, Brazil, in May.

Heat index

In May, the heat index is appraised at a blistering 41°C (105.8°F). Extra precautions are necessary, heat cramps and heat exhaustion are plausible outcomes. Extended activity could lead to heatstroke.
Records show heat index calculations are tailored for shaded regions and mild winds. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a numerical representation of warmth when taking temperature and moisture levels into account. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. Relative humidity in excess curtails evaporation, therefore reducing heat dissipation from the body, leading to feelings of excess heat. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

In São Mateus do Maranhão, the average relative humidity in May is 89%.

Rainfall

In May, in São Mateus do Maranhão, the rain falls for 26.2 days. Throughout May, 122mm (4.8") of precipitation is accumulated. In São Mateus do Maranhão, during the entire year, the rain falls for 247.2 days and collects up to 1281mm (50.43") of precipitation.

Daylight

The average length of the day in May is 11h and 56min.
On the first day of the month, sunrise is at 05:55 and sunset at 17:53. On the last day of May, in São Mateus do Maranhão, Brazil, sunrise is at 05:58 and sunset at 17:52 -03.

Sunshine

In May, the average sunshine in São Mateus do Maranhão is 6.2h.

UV index

February through June and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The maximum UV index of 6 during May leads to these instructions:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.