April weather forecast
São Francisco do Piauí, Brazil

April, like March, is another hot autumn month in São Francisco do Piauí, Brazil, with an average temperature ranging between min 22.1°C (71.8°F) and max 31.5°C (88.7°F).

Temperature

São Francisco do Piauí's coldest month, April, registers temperatures that range from a high of 31.5°C (88.7°F) to a low of 22.1°C (71.8°F).

Heat index

The average heat index in April is computed to be an extremely hot 40°C (104°F). Undertake additional safety actions, risk of heat cramps and heat exhaustion is significant. Persistent activity may induce heatstroke.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', determines the feeling of heat when you account for the relative humidity. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. The body is at risk of dehydration and related complications when it fails to shed excessive heat.

Humidity

In April, the average relative humidity in São Francisco do Piauí is 74%.

Rainfall

In São Francisco do Piauí, during April, the rain falls for 19.6 days and regularly aggregates up to 135mm (5.31") of precipitation. In São Francisco do Piauí, Brazil, during the entire year, the rain falls for 159.4 days and collects up to 844mm (33.23") of precipitation.

Daylight

The average length of the day in April is 11h and 56min.
On the first day of the month, sunrise is at 05:52 and sunset at 17:54. On the last day of April, sunrise is at 05:51 and sunset at 17:43 -03.

Sunshine

April has the least sunshine of the year in São Francisco do Piauí, with an average of 7.4h of sunshine.

UV index

The average daily maximum UV index in April in São Francisco do Piauí is 7. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 7 in April interprets into the following advice:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.