July weather forecast
Hanoi, Vietnam

Hanoi's July weather forms the heart of summer with high temperatures, increased humidity, and vigorous rain. Indeed, this latter parameter reaches its annual zenith with approximately 92mm (3.62") of rainfall, suggesting the heaviest downpours of the year occur in July. The month, though it brings in dampness with the rain, also presents locals and tourists with refreshing and clear air. The city transitions into August, maintaining similar conditions but with a slight relief in terms of precipitation.

Temperature

The transition into July reveals an average high-temperature of a tropical 34°C (93.2°F), mirroring a close resemblance to June. Hanoi, during July nights, observes an average temperature of 26.3°C (79.3°F).

Heat index

The heat index value during July is evaluated at a blazing hot 50°C (122°F). Heed: Expect heat cramps and heat exhaustion. Continued action may cause heatstroke.
Heat index values are typically calculated for conditions of shade and a light breeze. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'feels like', arises from combining readings of air temperature and relative moisture content. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
Perspiring is a crucial mechanism for the human body, allowing it to release excessive warmth through evaporating sweat. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.

Humidity

The average relative humidity in July is 76%.

Rainfall

In July, the rain falls for 23.3 days. Throughout July, 92mm (3.62") of precipitation is accumulated. In Hanoi, during the entire year, the rain falls for 181.2 days and collects up to 595mm (23.43") of precipitation.

Daylight

In Hanoi, the average length of the day in July is 13h and 16min.
On the first day of July, sunrise is at 05:18 and sunset at 18:42. On the last day of the month, sunrise is at 05:30 and sunset at 18:35 +07.

Sunshine

In July, the average sunshine is 9.6h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: The UV index of 7 during July leads to these advisories:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. To cut down UV radiation exposure by about half, sport a wide-brim hat.