June weather forecast and climate
Manaus, Brazil

June, the first month of the winter, in Manaus, is also a hot month, with average temperature ranging between min 23°C (73.4°F) and max 31°C (87.8°F).

Temperature

In Manaus, the average high-temperature is relatively the same as in May - a still tropical 31°C (87.8°F). In June, the average low-temperature is 23°C (73.4°F).

Heat index

In June, the average heat index is estimated at a scorching 42°C (107.6°F). Beware - heat cramps and heat exhaustion are very likely. Heatstroke is imminent with prolonged activity.
Note that heat index values are valued for light wind and location in the shade. With the 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', 'felt air temperature', or 'real feel', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (pregnancy, differences in body mass, height, and shape, metabolic differences). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. 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.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in Manaus is 83%.

Rainfall

In Manaus, it is raining for 11 days, with typically 115.4mm (4.5") of accumulated precipitation. Throughout the year, in Manaus, there are 160 rainfall days, and 2307.3mm (90.8") of precipitation is accumulated.

Daylight

June has the shortest days of the year in Manaus, with an average of 11.9h of daylight.

Sunshine

In Manaus, the average sunshine in June is 6.2h.

UV index

In Manaus, the average daily maximum UV index in June is 11. A UV Index estimate of 11, and higher, represents an excessive health risk from the exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 11 interpret into the following advice:
Practice all essential precautions. Protection against sun damage is crucial. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim.