April weather forecast
Teresina, Brazil

In April, Teresina witnesses a significant reduction in rainfall, turning the city into a slightly drier place compared to the preceding months. Temperatures remain warm but steady, while a moderate decrease in daylight hours sets in. The precipitation volumes drop to 224mm (8.82") in April, signaling the onset of the move towards the drier part of the year. Although there is a reduced cloud cover, the relative humidity stays high, contributing to a somewhat sultry weather. To sum up, April in Teresina is marked by warm temperatures, lower rainfall, and high humidity.

Temperature

April and May are identified as the coldest months in Teresina, with an average high-temperature of 31.3°C (88.3°F).

Heat index

Throughout April, the heat index is calculated to be a blistering 43°C (109.4°F). Eyes open: Heat cramps and heat exhaustion are expected. Prolonged exertion could lead to heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', ties air temperature with relative humidity to produce the perceived temperature sensation. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
Perspiring is a crucial mechanism for the human body, allowing it to release excessive warmth through evaporating sweat. Elevated relative humidity disrupts typical body cooling by reducing the evaporation rate, consequently decreasing the body's cooling rate and enhancing the feeling of heat. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

March and April, with an average relative humidity of 83%, are the most humid months.

Rainfall

In Teresina, in April, during 26.6 rainfall days, 224mm (8.82") of precipitation is typically accumulated. Throughout the year, in Teresina, Brazil, there are 207.4 rainfall days, and 1348mm (53.07") of precipitation is accumulated.

Daylight

In April, the average length of the day in Teresina, Brazil, is 12h and 0min.
On the first day of April, sunrise is at 05:53 and sunset at 17:56. On the last day of the month, sunrise is at 05:50 and sunset at 17:46 -03.

Sunshine

April has the least sunshine of the year in Teresina, with an average of 6.7h of sunshine.

UV index

The months with the highest UV index are January, March through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for average individuals.
Note: In April, a daily maximum UV index of 7 leads to the following instructions:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.