Weather in Gwangju in May

Prime time. May is about as good as Gwangju gets. Highs average 23.2 °C, lows 11.4 °C, and rain falls on 8 days — nothing in the month is working against you.

May ranks 2 of 12 in Gwangju. Only October scores clearly higher, and the difference is small enough to be settled by price rather than weather.

The rain arrives in bursts — 4 of the 8 wet days are heavy ones. Mornings tend to hold; build the outdoor half of each day before lunch and keep the afternoon flexible. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

Averages flatten a month, and this one hides a few things: it never really gets hot: not one day in an average May reaches 30 °C. Across the twenty years measured, the hottest May day reached 30.7 °C and the coldest night fell to 3.9 °C, and the wettest single day dropped 89 mm — roughly 79% of the month's rain in one day.

May is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest May on record still delivered 218 mm against 34 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 113 mm average is a reasonable planning figure, not a promise.

Wind is light at 8.6 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 78%, high enough to notice on the warm days without dominating them.

How May sits in the year

The month is on the way up: 5 °C warmer than April, and June adds another 3.4 °C. Late in the month feels noticeably different from the start of it, which is worth knowing if the trip is short.

Daylight in May

May is at or near the longest days of Gwangju's year: 14 hours of daylight, gaining 0.8 hours across the month. Evenings are the real gain — dinner outdoors still happens in full light.

Sea temperature

The sea sits at about 17.3 °C in May — cold — a quick dip rather than a swim, and a wetsuit if you are in for longer. The sea peaks at 27.3 °C in August and bottoms out at 14.4 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead.

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

May in Gwangju versus nearby

If Gwangju is one option among several, the nearby comparison is worth making. Daegu is close enough to be a coin toss — within a degree on temperature, the same number of rain days. Busan is close enough to be a coin toss — 2.1 °C cooler, 1 day more rain.

So: May works, with October the better month by 7 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in Gwangju

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