The weather in
May in
Vientiane,
Laos, continues to intensify, with relatively high temperatures and a considerable increase in rainfall from 85mm (3.35") in
April to 246mm (9.69"). A marked increase in humidity accompanies this shift to the monsoon season, with the relative humidity reaching 78%. The lush green scenery after the rain showers leaves Laos at its most beautiful, making it a popular time for photographers and nature lovers to visit. Outdoor exploration, however, requires careful planning due to the heavy rainfall.
Temperature
With May's arrival, Vientiane notes an average high-temperature of a still tropical 33°C (91.4°F), closely following the trend of the preceding month. During the month of May, the nighttime temperature in Vientiane falls to an average of 24.6°C (76.3°F).
Heat index
The heat index for May is computed to be a life-threatening hot 47°C (116.6°F).
Attention: Heat exhaustion and heat cramps are anticipated. Prolonged effort can result in heatstroke.
The standards for the heat index are set for locations in shade and under light breezes. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', gives a temperature feeling by integrating air temperature and humidity. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.
Humidity
The average relative humidity in May in Vientiane is 78%.
Rainfall
In Vientiane, in May, it is raining for 15 days, with typically 246mm (9.69") of accumulated precipitation. In Vientiane, during the entire year, the rain falls for 118 days and collects up to 1661mm (65.39") of precipitation.
Daylight
In Vientiane, the average length of the day in May is 12h and 59min.
On the first day of May in Vientiane, Laos, sunrise is at 05:42 and sunset at 18:30. On the last day of the month, sunrise is at 05:33 and sunset at 18:41 +07.
Sunshine
In Vientiane, the average sunshine in May is 6.7h.
UV index
The months with the highest UV index are
March through
September, with an average maximum UV index of 12. A UV Index reading of 11, and higher, represents an extreme health hazard from unsafe exposure to UV radiation for the average person.
Note: A maximum high daily UV index of 12 during May translates into the following directions:
Ensure every key safety measure. People with light skin might sustain burns in fewer than 5 minutes. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Sunscreen with an SPF of 30 or higher should be applied generously and frequently reapplied even on cloudy days, especially after each swim or outdoor workout.