Hanoi
Vietnam
Long-term weather forecast
Long-term weather forecast

August weather forecast and climate
Hanoi, Vietnam

The beautiful Tran Quoc Pagoda in Hanoi, Vietnam, with a view of more city structures in the far background
The beautiful Tran Quoc Pagoda in Hanoi, Vietnam, with a view of more city structures in the far background
The last month of the summer, August, is another tropical month in Hanoi, Vietnam, with temperature in the range of an average high of 33.1°C (91.6°F) and an average low of 25.5°C (77.9°F).

Temperature

In Hanoi, the average high-temperature in August is essentially the same as in July - a still tropical 33.1°C (91.6°F). In Hanoi, the average low-temperature is 25.5°C (77.9°F).

Heat index

In August, the average heat index is appraised at a burning hot 48.5°C (119.3°F). Be wary - heat exhaustion and heat cramps are highly anticipated. With continued activity, heatstroke is very likely.
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 'real feel', 'felt air temperature', 'apparent temperature', or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, differences in body mass, height, and shape, clothing). 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 normally cools itself by perspiration, as evaporated sweat carries heat away from the body. 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. 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

Months with the highest humidity are August and September, with an average relative humidity of 80%.

Rainfall

August is the month with the most rainfall in Hanoi, Vietnam. Rain falls for 21.5 days and accumulates 135mm (5.31") of precipitation.

Daylight

In Hanoi, the average length of the day is 12.8h.

Sunshine

The average sunshine in August is 9.5h.

UV index

Months with the highest UV index in Hanoi are May through September, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to the UV radiation for the ordinary person.
Note: In August, the average maximum UV index of 7 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. 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.

What is the temperature in August in Hanoi?

In August, the average high-temperature is 33.1°C (91.6°F), and the average low-temperature is 25.5°C (77.9°F). In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), that combines relative humidity and air temperature, is evaluated at 48.5°C (119.3°F).

What are the most humid months in Hanoi?

August and September, with an average relative humidity of 80%, are most humid months in Hanoi.

What is the average humidity in August in Hanoi?

In August, the average relative humidity in Hanoi is 80%.

How much does it rain in Hanoi in August?

In Hanoi, in August, it is raining for 21.5 days, with typically 135mm (5.31") of accumulated precipitation.

What is the rainiest month in Hanoi?

August is the month with the most rainfall in Hanoi, Vietnam. Rain falls for 21.5 days and accumulates 135mm (5.31") of precipitation.

What is the average length of the day in August in Hanoi?

The average length of the day in August in Hanoi, Vietnam, is 12.8h.

How many hours of sunshine does Hanoi have in August?

In August, the average sunshine is 9.5h.

When is the highest UV index in Hanoi?

Months with the highest UV index in Hanoi, Vietnam, are May through September, with an average maximum UV index of 7.

What is the UV index reading in August in Hanoi?

In Hanoi, the average daily maximum UV index in August is 7. A UV Index reading of 6 to 7 represents a high health risk from the exposure to the Sun's UV rays.
Average temperature in August - Hanoi, Vietnam
  • Average high temperature in August: 33.1°C

The warmest month (with the highest average high temperature) is June (35.4°C).
The month with the lowest average high temperature is January (20.7°C).

  • Average low temperature in August: 25.5°C

The month with the highest average low temperature is June (26.6°C).
The coldest month (with the lowest average low temperature) is January (14.4°C).

Average humidity in August - Hanoi, Vietnam
  • Average humidity in August: 80%

Months with the highest relative humidity are August and September (80%).
The month with the lowest relative humidity is December (69%).

Average rainfall in August - Hanoi, Vietnam
  • Average rainfall in August: 135mm

The wettest month (with the highest rainfall) is August (135mm).
The driest month (with the lowest rainfall) is February (7mm).

Average rainfall days in August - Hanoi, Vietnam
  • Average rainfall days in August: 21.5 days

The month with the highest number of rainy days is July (23.3 days).
The month with the lowest number of rainy days is February (7.8 days).

Average daylight in August / Average sunshine in August - Hanoi, Vietnam
  • Average daylight in August: 12.8h

The month with the longest days is June (Average daylight: 13.4h).
The month with shortest days is December (Average daylight: 10.9h).

  • Average sunshine in August: 9.5h

The month with most sunshine is June (Average sunshine: 10.1h).
The month with least sunshine is January (Average sunshine: 3.7h).

Average UV index in August - Hanoi, Vietnam
  • Average UV index in August: 7

Months with the highest UV index are May, June, July, August and September (UV index 7).
The month with the lowest UV index is December (UV index 4).