June weather forecast
Ha Long, Vietnam

June announces the arrival of summer in earnest in Ha Long. Last month's rainfall not only retains but also exacerbates up to 224mm (8.82"). Astoundingly, sunlight also beams down for its maximum average duration of 13.4 hours, heating up both the land and sea. While the city looks breathtaking under the warm summer lights, this weather brings with it increased humidity. Venturing out during early morning hours or late evenings can help avoid the afternoon heat.

Temperature

June, noted for its average high-temperature of 34.1°C (93.4°F) and an average low-temperature of 25.4°C (77.7°F), is considered the warmest month.

Heat index

During June, the heat index is estimated at a blazing hot 50°C (122°F). Attention: Heat exhaustion and heat cramps are anticipated. Prolonged effort can result in heatstroke.
In terms of the heat index, values are set with light wind and shade conditions in mind. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. Heightened relative humidity interferes with the body's usual cooling mechanism by reducing evaporation, subsequently decreasing the body's cooling rate and increasing the sensation of heat. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

In Ha Long, the average relative humidity in June is 75%.

Rainfall

In Ha Long, in June, it is raining for 25.3 days, with typically 224mm (8.82") 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

In June, the average sea temperature is 29.3°C (84.7°F).
Note: Temperatures between 25°C (77°F) and 29°C (84.2°F) are ideal for swimming, diving, and similar water activities, ensuring pleasure and comfort for extended periods without feeling uneasy.

Daylight

The month with the longest days in Ha Long is June, with an average of 13h and 24min of daylight.
On the first day of June, sunrise is at 05:10 and sunset at 18:29. On the last day of the month, sunrise is at 05:13 and sunset at 18:37 +07.

Sunshine

The month with the most sunshine in Ha Long is June, with an average of 9.9h of sunshine.

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 risk from exposure to the Sun's UV rays for ordinary individuals.
Note: In June, the maximum UV index of 7 suggests this advice:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Opt for tightly woven and loose clothing to enhance protection from the Sun. Alert! The Sun's UV rays are heightened by the reflection of sand and water.