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

The beginning of July records an average high-temperature of a still hot 32.9°C (91.2°F), almost echoing the conditions of the previous month. An average minimum temperature of 25°C (77°F) is recorded during the month of July.

Heat index

The heat index for July is estimated at a life-threatening hot 48°C (118.4°F). Prudent: Heat cramps and heat exhaustion are likely. Heatstroke becomes imminent with sustained exertion.
When referencing the heat index, its values are suitable for shady environments and light breezes. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'real feel' or 'felt air temperature', gives an indication of how one might feel in terms of heat after considering humidity. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

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

Rainfall

In Ha Long, in July, it is raining for 28.3 days, with typically 255mm (10.04") of accumulated 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: Seeking a refreshing experience in waters over 30°C (86°F) can be challenging.

Daylight

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

Sunshine

In July, the average sunshine is 9h.

UV index

April through August, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: A maximum daily UV index of 7 during July morphs into the following directions:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Heed this! UV intensity is much stronger when reflected off sand and water.