Weather in Qui Nhon in May

Shoulder season. May is shoulder season in Qui Nhon — cheaper, quieter, and a genuine gamble. The heat itself is manageable at 30.3 °C, but 82% humidity is what you will actually feel.

May ranks 7 of 12 in Qui Nhon: past the worst of the year but short of February, which is the month to book if the dates are open.

Rain on 14 days, 3 of them heavy. Enough to need a plan B, not enough to need a plan around it. Natural fibres and a second shirt for the day. At 82% nothing dries, including you.

What the averages hide

Averages flatten a month, and this one hides a few things: 19 days top 30 °C — hot spells arrive, but they break; the day barely swings — 2.7 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest May day reached 34.1 °C and the coldest night fell to 24.7 °C, and the wettest single day dropped 59 mm — roughly 58% of the month's rain in one day.

May is moderately variable: 12 mm in the driest year against 288 mm in the wettest, around an average of 102 mm. Roughly two Mays in three land near that average, and the third does something else entirely.

Wind is light at 12.2 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 82%, high enough to notice on the warm days without dominating them.

How May sits in the year

Temperatures hold steady either side: 28.7 °C in April, 30.3 here, 31 in June. Nothing about the timing within the month matters much. Rain has already shifted: 9 days more than April had.

Daylight in May

Qui Nhon sits close enough to the equator that daylight barely moves all year — 12.8 hours in May, against a range of just 1.6 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 °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 Qui Nhon versus nearby

If Qui Nhon is one option among several, the nearby comparison is worth making. Nha Trang is close enough to be a coin toss — within a degree on temperature, 6 days more rain. Hoi An is close enough to be a coin toss — 2.3 °C warmer, 2 days less rain.

So: May is a compromise. February is 38 points better and is what Qui Nhon 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 Qui Nhon

See all twelve months in Qui Nhon, or where else to go in May.