March weather forecast
Vientiane, Laos

March in Vientiane, Laos experiences a significant rise in temperatures, signifying the transition into the hotter months of the year. This month sees average temperatures fluctuating between 21.5°C (70.7°F) and 33°C (91.4°F) and records a UV index of 12, which is the maximum for the year. Precautions should be taken when venturing outdoors to avoid excessive sun exposure. The early onset of summer makes March an excellent time to enjoy the various water-based activities in Laos.

Temperature

Vientiane, Laos, in March witnesses an average high-temperature of a still tropical 33°C (91.4°F), indicating a slight variation from February's 30.3°C (86.5°F). March's average low-temperature reading settles at an agreeable 21.5°C (70.7°F).

Heat index

During March, the heat index is estimated at a scorching 42°C (107.6°F). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.
For clarity, heat index numbers account for light winds and areas under shade. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', arises from combining readings of air temperature and relative moisture content. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.

Humidity

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

Rainfall

In Vientiane, in March, it is raining for 4 days, with typically 34mm (1.34") of accumulated precipitation. Throughout the year, there are 118 rainfall days, and 1661mm (65.39") of precipitation is accumulated.

Daylight

In Vientiane, the average length of the day in March is 12h and 2min.
On the first day of March, sunrise is at 06:27 and sunset at 18:15. On the last day of the month, sunrise is at 06:04 and sunset at 18:22 +07.

Sunshine

In Vientiane, the average sunshine in March is 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 estimate of 11, and higher, represents an ultimate health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: In March, an average UV index of 12 transforms into the following instructions:
Employ every precaution of importance, unprotected skin and eyes could burn within moments. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Apply generously and frequently reapply a sunscreen with SPF 30 or more even on cloudy days, particularly after a swim or outdoor exercise.