June weather forecast and climate
Hanoi, Vietnam

The first month of the summer, June, is a torrid month in Hanoi, Vietnam, with average temperature fluctuating between 26.6°C (79.9°F) and 35.4°C (95.7°F).

Temperature

June is the warmest month, with an average high-temperature of 35.4°C (95.7°F) and an average low-temperature of 26.6°C (79.9°F).

Heat index

The average heat index is estimated at a life-threatening hot 52.4°C (126.3°F). Beware - heat cramps and heat exhaustion are very likely. Heatstroke is imminent with prolonged activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'feels like', 'felt air temperature', or 'real feel', is a measure that combines both air temperature and relative humidity into a single value that indicates how hot the weather feels. Additional factors like activity, differences in body mass, height, and shape, metabolic differences, and clothing affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. 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 exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

The average relative humidity in June is 71%.

Rainfall

In Hanoi, Vietnam, in June, it is raining for 19.5 days, with typically 66mm (2.6") of accumulated precipitation. Throughout the year, in Hanoi, there are 181.2 rainfall days, and 595mm (23.43") of precipitation is accumulated.

Daylight

With an average of 13.4h of daylight, June has the longest days of the year.

Sunshine

The month with the most sunshine in Hanoi is June, with an average of 10.1h of sunshine.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in Hanoi, Vietnam. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to the UV radiation for the ordinary person.
Note: The daily maximum UV index of 7 interpret into the following advice:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.