April weather forecast
Fortaleza, Brazil

April in Fortaleza brings with it the highest average rainfall of the year, an impressive 356mm (14.02") spread across 21 days. This is paired with marginally lower high and low temperatures, making it a cooler month compared to its predecessors. The sea temperature dips to 28.9°C (84°F), again slightly cooler but still comfortable for aquatic activities. Despite the heavy rain, April's daylight persists with a steady 12 hours, while the sunshine hours increase to an average of 5.2. While the skies might be overcast, the beauty of Fortaleza remains ever vibrant.

Temperature

The average high-temperature in Fortaleza during April is a still warm 29.7°C (85.5°F), showing a negligible deviation from March. Fortaleza temperatures generally rest at a low of 23.4°C (74.1°F) during the April nights.

Heat index

The average heat index in April is estimated at a sweltering 38°C (100.4°F). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.
Records show heat index calculations are tailored for shaded regions and mild winds. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', gauges the sensation of temperature factoring in the air's moisture content. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are quite important for children. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

With an average relative humidity of 85.2%, April is the most humid month.

Rainfall

The month with the most rainfall is April, when the rain falls for 21 days and typically aggregates up to 356mm (14.02") of precipitation.

Sea temperature

With an average sea temperature of 28.9°C (84°F), April is the month with the warmest seawater.
Note: Water temperatures between 25°C (77°F) and 29°C (84.2°F) are ideal for swimming, diving, and other activities, ensuring comfort and enjoyment for lengthened periods.

Daylight

The average length of the day in April in Fortaleza is 12h and 2min.
On the first day of April, sunrise is at 05:35 and sunset at 17:39. On the last day of the month, sunrise is at 05:31 and sunset at 17:30 -03.

Sunshine

In April, the average sunshine is 5.2h.

UV index

January through April, September through December, with an average maximum UV index of 12, are months with the highest UV index in Fortaleza, Brazil. A UV Index reading of 11, and higher, represents an excessive health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 12 in April transforms into the following instructions:
Undertake all key precautions, as unprotected skin and eyes may get burns in no time. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Experience reduced UV exposure by about half when donning a wide-brim hat. Post an outdoor workout or swimming, a broad-spectrum SPF 30+ sunscreen should be applied generously and frequently. Alert! The Sun's UV rays are heightened by the reflection of sand and water.