May weather forecast
Porto Velho, Brazil

May, the last month of the autumn in Porto Velho, is also a hot month, with an average temperature varying between 31.2°C (88.2°F) and 21.8°C (71.2°F).

Temperature

Porto Velho indicates an average high-temperature of a still tropical 31.2°C (88.2°F) in May, showing minor variation from April's 30.7°C (87.3°F). In the month of May, Porto Velho witnesses a consistent average low-temperature of 21.8°C (71.2°F).

Heat index

The average heat index in May is estimated at a blisteringly hot 43°C (109.4°F). Remain cautious: Heat cramps along with heat exhaustion are foreseeable. Ongoing activity may precipitate heatstroke.
Research indicates the heat index considers values in shaded locales and with light winds. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a measure of how hot it feels when the actual air humidity is factored in. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important 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.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.

Humidity

In May, the average relative humidity in Porto Velho is 85%.

Rainfall

In Porto Velho, during May, the rain falls for 23.6 days and regularly aggregates up to 98mm (3.86") of precipitation. Throughout the year, in Porto Velho, there are 251.1 rainfall days, and 1471mm (57.91") of precipitation is accumulated.

Daylight

In Porto Velho, Brazil, the average length of the day in May is 11h and 43min.
On the first day of May in Porto Velho, sunrise is at 06:18 and sunset at 18:06. On the last day of the month, sunrise is at 06:24 and sunset at 18:02 -04.

Sunshine

In Porto Velho, the average sunshine in May is 7.6h.

UV index

May through November, with an average maximum UV index of 7, are months with the highest UV index in Porto Velho. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum UV index of 7 during May translates into these guidelines:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Enhance your sun protection with tightly woven, yet airy clothing.