May weather forecast
Ho Chi Minh City, Vietnam

By May, Ho Chi Minh City has fully transitioned into its wet season, marked by a substantial leap in rainfall to 139mm (5.47"). In tandem with the increase in rainfall, humidity levels also see a prominent rise to 72%. However, temperatures remain consistently high, with heat being a hallmark of the city’s tropical weather. Despite the onset of monsoon, the city retains its characteristic high energy, and tourism activities can continue with adapted schedules. After all, May’s weather adds an element of dynamism to the lively Ho Chi Minh City vibe.

Temperature

May's onset records an average high-temperature of a hot 34.1°C (93.4°F), a near match to April's 35°C (95°F). Ho Chi Minh City experiences an average low-temperature of 26.9°C (80.4°F) in month of May.

Heat index

The heat index value for May is calculated to be a burning hot 48°C (118.4°F). Take note: Heat exhaustion and heat cramps are expected. Heatstroke can occur with prolonged effort.
Records show heat index calculations are tailored for shaded regions and mild winds. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is the result of factoring in humidity to the air temperature, indicating perceived warmth. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. Excessive relative humidity disturbs the body's typical cooling process by reducing evaporation, leading to a decrease in body cooling rate and an increase in the sensation of warmth. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

In Ho Chi Minh City, the average relative humidity in May is 72%.

Rainfall

In Ho Chi Minh City, in May, during 27.8 rainfall days, 139mm (5.47") of precipitation is typically accumulated. Throughout the year, there are 241.8 rainfall days, and 1283mm (50.51") of precipitation is accumulated.

Daylight

In Ho Chi Minh City, the average length of the day in May is 12h and 37min.
On the first day of May, sunrise is at 05:35 and sunset at 18:06. On the last day of the month, sunrise is at 05:29 and sunset at 18:12 +07.

Sunshine

In May, the average sunshine in Ho Chi Minh City is 10.3h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index. January through December, with an average maximum UV index of 7, are months with the lowest UV index. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In May, a daily maximum UV index of 7 leads to the following instructions:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.