Weather in Hua Hin in May

A hard month. May asks something of you. Go in knowing what. You should expect rain on 27 days of the month, which is more days wet than dry.

May ranks 12 of 12 — near the bottom of Hua Hin's year. December is the month that works, and the swing between the two is 43 points, which is a different holiday rather than a slightly better one.

Rain on 27 of the month's 31 days, 3 of them heavy. At that frequency a wet-weather backup is not a contingency, it is the itinerary — book the indoor things first and treat the clear days as the bonus. Pack for 32.1 °C days and 27.3 °C nights; the spread matters more here than any single number.

What the averages hide

Averages flatten a month, and this one hides a few things: 28 days top 30 °C, making the heat continuous rather than occasional; the day barely swings — 4.8 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest May day reached 36.7 °C and the coldest night fell to 25.3 °C, and the wettest single day dropped 83 mm — roughly 53% of the month's rain in one day.

May is moderately variable: 80 mm in the driest year against 347 mm in the wettest, around an average of 157 mm. Roughly two Mays in three land near that average, and the third does something else entirely.

Wind is light at 10 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 77%, high enough to notice on the warm days without dominating them.

How May sits in the year

Temperatures hold steady either side: 32.9 °C in April, 32.1 here, 31.2 in June. Nothing about the timing within the month matters much. Rain has already shifted: 13 days more than April had.

Daylight in May

Hua Hin sits close enough to the equator that daylight barely moves all year — 12.7 hours in May, against a range of just 1.5 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

Sea temperature

The sea sits at about 30.5 °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 Hua Hin versus nearby

If Hua Hin is one option among several, the nearby comparison is worth making. Bangkok is close enough to be a coin toss — within a degree on temperature, 5 days less rain. Lat Krabang is close enough to be a coin toss — within a degree on temperature, 5 days less rain.

So: May is a compromise. December is 43 points better and is what Hua Hin 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 Hua Hin

See all twelve months in Hua Hin, or where else to go in May.