March weather forecast
Vientiane, Laos

March, the first month of the spring in Vientiane, is still a hot month, with an average temperature ranging between max 33°C (91.4°F) and min 21.5°C (70.7°F).

Temperature

In March, the average high-temperature is relatively the same as in February - a still tropical 33°C (91.4°F). In Vientiane, Laos, in March, the average low-temperature is 21.5°C (70.7°F).

Heat index

The average heat index in March is evaluated at a scorching 41.8°C (107.2°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'felt air temperature', 'apparent temperature', or 'real feel', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is individual, with diverse people perceiving weather differently for numerous reasons (differences in body mass, height, and shape, pregnancy, wind), and activity. 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. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. 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

March is the least humid month in Vientiane, with an average relative humidity of 66%.

Rainfall

In Vientiane, during March, the rain falls for 4 days and regularly aggregates up to 33.7mm (1.33") of precipitation. In Vientiane, during the entire year, the rain falls for 118 days and collects up to 1660.5mm (65.37") of precipitation.

Daylight

In Vientiane, the average length of the day in March is 12h and 2min.
On the first day of the month, sunrise is at 06:28 and sunset at 18:15. On the last day of March, sunrise is at 06:04 and sunset at 18:22 +07.

Sunshine

In Vientiane, the average sunshine in March is 7h.

UV index

March through September, with an average maximum UV index of 12, are months with the highest UV index in Vientiane, Laos. A UV Index estimate of 11, and higher, represents an excessive health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: In March, the average maximum UV index of 12 translate into the following recommendations:
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. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. 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.