July weather forecast
Ha Long, Vietnam

The peak of the summer season is marked in July with some of the highest temperatures of the year. The most rainfall of the year also occurs now—255mm (10.04") throughout the month. Residents and tourists anticipate wet conditions coupled with warm temperatures, bringing about a unique environment. Towards the end of the month, the roaring summer heat gives way to milder days. The city's mystique peaks during these months, filling the atmosphere with surreal serenity.

Temperature

With the advent of July, Ha Long experiences an average high-temperature of a still tropical 32.9°C (91.2°F), mirroring a close resemblance to the previous month. July nights in Ha Long are marked by an average low-temperature of 25°C (77°F).

Heat index

For July, the heat index is appraised at a blazing hot 48°C (118.4°F). Be alert: Heat exhaustion along with heat cramps are probable. Heatstroke is a threat with sustained physical activity.
Remember that heat index calculations are made for conditions in the shade with light wind. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. 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 particularly relevant to babies and toddlers. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.

Humidity

In July, the average relative humidity in Ha Long is 81%.

Rainfall

In Ha Long, during July, the rain falls for 28.3 days and regularly aggregates up to 255mm (10.04") of precipitation. In Ha Long, during the entire year, the rain falls for 237.1 days and collects up to 1472mm (57.95") of precipitation.

Sea temperature

July is the month with the warmest seawater, with an average sea temperature of 30.8°C (87.4°F).
Note: Swimming in waters heated beyond 30°C (86°F) can arguably feel less refreshing.

Daylight

In July, the average length of the day in Ha Long is 13h and 16min.
On the first day of the month, sunrise is at 05:14 and sunset at 18:37. On the last day of July, in Ha Long, sunrise is at 05:25 and sunset at 18:30 +07.

Sunshine

The average sunshine in July is 9h.

UV index

The months with the highest UV index are April through August, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum UV index of 7 during July leads to these instructions:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Attention! The reflection of both water and sand can increase the intensity of UV rays.