April weather forecast
Manaus, Brazil

April, like March, is another hot autumn month in Manaus, Brazil, with an average temperature varying between 30.7°C (87.3°F) and 23.3°C (73.9°F).

Temperature

In April, the average high-temperature is practically the same as in March - a still hot 30.7°C (87.3°F). In April, the average low-temperature is 23.3°C (73.9°F).

Heat index

In April, the average heat index is appraised at a blistering 42°C (107.6°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'apparent temperature', 'real feel', or 'felt air temperature', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like activity, metabolic differences, clothing, and pregnancy affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 37.5°C (99.5°F) to 38.3°C (100.9°F), thermal conditions are potentially life-threatening.

Humidity

In Manaus, the average relative humidity in April is 87%.

Rainfall

In Manaus, in April, during 18 rainfall days, 311mm (12.24") of precipitation is typically accumulated. In Manaus, during the entire year, the rain falls for 160 days and collects up to 2307mm (90.83") of precipitation.

Daylight

The average length of the day in April in Manaus is 12h and 2min.
On the first day of April in Manaus, sunrise is at 06:01 and sunset at 18:06. On the last day of the month, sunrise is at 05:57 and sunset at 17:57 -04.

Sunshine

The average sunshine in April is 3.7h.

UV index

January through May, August through December, with an average maximum UV index of 12, are months with the highest UV index in Manaus. A UV Index reading of 11, and higher, represents an extreme health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: The daily maximum UV index of 12 in April interpret into the following advice:
Practice all essential precautions. Protection against sun damage is crucial. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise.