Weather in Ho Chi Minh City in May

The month to avoid. May is the month most people should skip in Ho Chi Minh City. You should expect rain on 18 days of the month, which is more days wet than dry.

May ranks 10 of 12 — near the bottom of Ho Chi Minh City's year. December is the month that works, and the swing between the two is 42 points, which is a different holiday rather than a slightly better one.

Rain on 18 days, 5 of them heavy. Enough to need a plan B, not enough to need a plan around it. Pack for heat management rather than style: shade, water, and a schedule that gives up on the middle of the day.

What the averages hide

Averages flatten a month, and this one hides a few things: 12 days clear 35 °C, so a serious heatwave is normal rather than notable. Across the twenty years measured, the hottest May day reached 42.4 °C and the coldest night fell to 23.7 °C, and the wettest single day dropped 89 mm — roughly 57% of the month's rain in one day.

May is moderately variable: 36 mm in the driest year against 282 mm in the wettest, around an average of 155 mm. Roughly two Mays in three land near that average, and the third does something else entirely.

Wind is light at 7.6 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 74%.

How May sits in the year

The month is on the way down: 3.5 °C cooler than April, with June dropping another 3.1 °C. The first week and the last are not the same trip. Rain has already shifted: 12 days more than April had.

Daylight in May

Ho Chi Minh City sits close enough to the equator that daylight barely moves all year — 12.6 hours in May, against a range of just 1.3 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

Sea temperature

The sea sits at about 29.9 °C in May — warm enough that the water offers no relief from the heat. This is the warmest the water gets all year.

How busy it gets

Off season. The genuine off season: cheapest by a distance, with the caveat that some tours and restaurants close entirely.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

May in Ho Chi Minh City versus nearby

If Ho Chi Minh City is one option among several, the nearby comparison is worth making. Vũng Tàu is close enough to be a coin toss — within a degree on temperature, 3 days more rain. Cần Thơ is close enough to be a coin toss — within a degree on temperature, 2 days more rain.

So: May is a compromise. December is 40 points better and is what Ho Chi Minh City is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Ho Chi Minh City

See all twelve months in Ho Chi Minh City, or where else to go in May.