April weather forecast
Macapá, Brazil

April signals a gradual transition towards the drier season in Macapá. The covered sky starts to clear up, giving way to slightly more sunshine. Wind speeds decrease to an average of 9.7km/h (6mph), reducing the chill factor. It's a month with a relatively lower rainfall of 358mm (14.09"), when compared to March, indicating the gradual arrival of the arid period. The temperatures remain moderately hot, keeping weather conditions favorable for outdoor activities.

Temperature

March and April, with an average high-temperature of 28.8°C (83.8°F), are the coldest months.

Heat index

The heat index value for April is evaluated at a very hot 35°C (95°F). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.
Heat index specifics point out values are for conditions of shade and a slight breeze. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is the result of factoring in humidity to the air temperature, indicating perceived warmth. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.
The body's self-cooling mechanism is rooted in perspiration, where evaporating sweat cools down excessive warmth. Relative humidity in excess curtails evaporation, therefore reducing heat dissipation from the body, leading to feelings of excess heat. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

The months with the highest humidity in Macapá are March and April, with an average relative humidity of 86%.

Rainfall

In Macapá, Brazil, during April, the rain falls for 29.5 days and regularly aggregates up to 358mm (14.09") of precipitation. Throughout the year, in Macapá, there are 280.7 rainfall days, and 2496mm (98.27") of precipitation is accumulated.

Sea temperature

The months with the coldest seawater in Macapá are February through April, with an average sea temperature of 27.7°C (81.9°F).
Note: Water activities including swimming and diving are pleasurable in temperatures between 25°C (77°F) and 29°C (84.2°F), ensuring comfort and enjoyment for extended time frames.

Daylight

In Macapá, Brazil, the average length of the day in April is 12h and 7min.
On the first day of the month, sunrise is at 06:24 and sunset at 18:31. On the last day of April, in Macapá, Brazil, sunrise is at 06:17 and sunset at 18:24 -03.

Sunshine

In Macapá, the average sunshine in April is 6.4h.

UV index

January through April and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: The average daily UV index of 6 in April transforms into the following instructions:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Caution! The Sun's UV intensity grows with reflections off sand and water.