April weather forecast
São Félix do Piauí, Brazil

April, the same as March, in São Félix do Piauí, Brazil, is another hot autumn month, with temperature in the range of an average low of 22.9°C (73.2°F) and an average high of 31.4°C (88.5°F).

Temperature

The coldest period is April, when temperatures fluctuate between an average high of 31.4°C (88.5°F) and a low of 22.9°C (73.2°F).

Heat index

For April, the heat index is estimated at a scorching 43°C (109.4°F). Prudent: Heat cramps and heat exhaustion are likely. Heatstroke becomes imminent with sustained exertion.
Be advised, the heat index considers values for conditions in shade and with a light breeze. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is found by incorporating humidity levels into the air temperature measurement. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. Under conditions of high relative humidity, the rate of evaporation decreases. This results in the body retaining more heat than under conditions of dry air. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.

Humidity

The months with the highest humidity are March and April, with an average relative humidity of 81%.

Rainfall

In April, the rain falls for 27.8 days. Throughout April, 274mm (10.79") of precipitation is accumulated. In São Félix do Piauí, during the entire year, the rain falls for 220.8 days and collects up to 1560mm (61.42") of precipitation.

Daylight

The average length of the day in April in São Félix do Piauí is 11h and 59min.
On the first day of April, sunrise is at 05:50 and sunset at 17:53. On the last day of the month, sunrise is at 05:48 and sunset at 17:42 -03.

Sunshine

With an average of 6.5h of sunshine, April has the least sunshine of the year.

UV index

In April, the average daily maximum UV index is 7. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for average individuals.
Note: In April, the UV index of 7 transforms into the following advice:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Tightly woven clothing, when worn loosely, shields effectively against the Sun.