May weather forecast
Can Tho, Vietnam

Weather in May in Can Tho, Vietnam witnesses a significant increase in rainfall--it goes up to 46mm (1.81") making May the month with the heaviest rainfall of the year. This increase brings about dense cloud coverage that blocks most of the sunlight. This clouds related increase results in a decrease of visibility to 9km (5.6mi). Even with shorter days, average sea temperature increases slightly to its highest value of the year. Despite the increase in rainfall and cloud coverage, the UV index remains constant, maintaining its intensity.

Temperature

A minor adjustment in Can Tho's average high-temperature is noted with the start of May, touching a tropical 33.9°C (93°F) from April's 35.2°C (95.4°F). May nights observe an average temperature dip to a warm 26.7°C (80.1°F).

Heat index

The average heat index in May is estimated at a burning hot 48°C (118.4°F). Heed: Expect heat cramps and heat exhaustion. Continued action may cause heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a metric representing the sensation of warmth when air temperature and moisture come together. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
The body's self-cooling mechanism is rooted in perspiration, where evaporating sweat cools down excessive warmth. Under conditions of high relative humidity, the rate of evaporation decreases. This results in the body retaining more heat than under conditions of dry air. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.

Humidity

In May, the average relative humidity is 73%.

Rainfall

In May, the rain falls for 18.5 days. Throughout May, 46mm (1.81") of precipitation is accumulated. Throughout the year, there are 165.5 rainfall days, and 394mm (15.51") of precipitation is accumulated.

Sea temperature

The month with the warmest seawater is May, with an average sea temperature of 29.8°C (85.6°F).
Note: With water temperature from 25°C (77°F) to 29°C (84.2°F), all water activities are comfortable and delightful, devoid of discomfort even for lengthened periods.

Daylight

In May, the average length of the day is 12h and 35min.
On the first day of the month, sunrise is at 05:39 and sunset at 18:08. On the last day of May, sunrise is at 05:34 and sunset at 18:14 +07.

Sunshine

The average sunshine in May in Can Tho is 9.8h.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 7. January through December, with an average maximum UV index of 7, are months with the lowest UV index. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the average person.
Note: A maximum UV index of 7 in May translates into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Attention! The reflection of both water and sand can increase the intensity of UV rays.