May weather forecast
São Félix do Tocantins, Brazil

The last month of the autumn, May, is another tropical month in São Félix do Tocantins, Brazil, with an average temperature varying between 30.4°C (86.7°F) and 21.4°C (70.5°F).

Temperature

May's climate shows a minor adjustment in average high-temperatures to a still tropical 30.4°C (86.7°F) from April's 30.3°C (86.5°F). São Félix do Tocantins reports a consistent average low-temperature of 21.4°C (70.5°F) throughout May nights.

Heat index

Throughout May, the heat index is computed to be a fiery hot 38°C (100.4°F). Implement more preventive measures, heat cramps and heat exhaustion are probable. Heatstroke might result from extended activity.
It is emphasized that the heat index's values are meant for shaded zones with mild winds. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
The body's natural response to excessive warmth is perspiration, as it allows for cooling through sweat evaporation. With an abundance of moisture present in the air, the process of evaporation becomes less effective, and the body fails to cool down as it should, leading to the sensation of overheating. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

In São Félix do Tocantins, the average relative humidity in May is 77%.

Rainfall

In May, in São Félix do Tocantins, the rain falls for 15.3 days. Throughout May, 44mm (1.73") of precipitation is accumulated. In São Félix do Tocantins, during the entire year, the rain falls for 198 days and collects up to 907mm (35.71") of precipitation.

Daylight

In May, the average length of the day in São Félix do Tocantins is 11h and 39min.
On the first day of the month, sunrise is at 06:11 and sunset at 17:55. On the last day of May, sunrise is at 06:17 and sunset at 17:51 -03.

Sunshine

The month with the least sunshine in São Félix do Tocantins is May, with an average of 7.3h of sunshine.

UV index

February through May and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: The UV index of 6 in May translates into these instructions:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Boost your sun resistance with garments that are densely woven yet spacious.