August weather forecast
Ha Long, Vietnam

August maintains the summer heat while ushering in a slightly different weather pattern. Turning a new leaf, the month records a surprisingly high rainfall of 317mm (12.48"). The balance between high temperatures and heavy rainfall creates a paradoxical yet intriguing climate. Despite the rainfall, average daylight hours decrease only slightly. The month's tropical conditions make indoor activities an appealing option.

Temperature

The arrival of August sees an average high-temperature of a still hot 31.9°C (89.4°F), hardly diverging from July's 32.9°C (91.2°F). In Ha Long, the average temperature during the nights of August drops to a warm 24.4°C (75.9°F).

Heat index

In August, the heat index is estimated at a life-threatening hot 45°C (113°F). Mind: Heat cramps along with heat exhaustion are anticipated. Heatstroke can develop with continued physical activity.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is an aggregate value of air's warmth and moisture to show the human-felt temperature. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
The body's self-cooling mechanism is rooted in perspiration, where evaporating sweat cools down excessive warmth. Excessive relative humidity disturbs the body's typical cooling process by reducing evaporation, leading to a decrease in body cooling rate and an increase in the sensation of warmth. As body temperatures escalate without effective heat release, one might face dehydration threats.

Humidity

August and September, with an average relative humidity of 83%, are the most humid months.

Rainfall

The month with the most rainfall is August, when the rain falls for 26.8 days and typically aggregates up to 317mm (12.48") of precipitation.

Sea temperature

In Ha Long, the average seawater temperature in August is 30.2°C (86.4°F).
Note: Water activities might not feel as soothing when temperatures are more than 30°C (86°F).

Daylight

In Ha Long, the average length of the day in August is 12h and 50min.
On the first day of August, sunrise is at 05:26 and sunset at 18:30. On the last day of the month, sunrise is at 05:35 and sunset at 18:08 +07.

Sunshine

The average sunshine in August is 9.1h.

UV index

April through August, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for average individuals.
Note: In August, an average UV index of 7 transforms into the following instructions:
Ward off overexposure. Defence against solar harm is crucial. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Be attentive! The UV exposure is heightened with reflections from sand and water.