June weather forecast
Vientiane, Laos

The first month of the summer, June, is still a tropical month in Vientiane, Laos, with average temperature varying between 31.9°C (89.4°F) and 24.9°C (76.8°F).

Temperature

In Vientiane, the average high-temperature is essentially the same as in May - a still tropical 31.9°C (89.4°F). In June, the average low-temperature is 24.9°C (76.8°F).

Heat index

The average heat index in June is estimated at an extremely hot 44.9°C (112.8°F). Beware: Heat cramps and heat exhaustion are very likely. Heatstroke is imminent with prolonged activity.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'felt air temperature', 'real feel', or 'apparent temperature', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like activity, clothing, wind, and metabolic differences affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity is 82%.

Rainfall

In June, in Vientiane, the rain falls for 18 days. Throughout June, 279.8mm (11.02") of precipitation is accumulated. In Vientiane, during the entire year, the rain falls for 118 days and collects up to 1660.5mm (65.37") of precipitation.

Daylight

The month with the longest days is June, with an average of 13.2h of daylight.

Sunshine

In June, the average sunshine is 5.1h.

UV index

March through September, with an average maximum UV index of 12, are months with the highest UV index in Vientiane. A UV Index reading of 11, and higher, represents an extreme threat to health from unprotected exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 12 in June transform into the following instructions:
Practice all-important precautions. Light skin people may get burned in less than 5 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim.