Weather in Fukuoka in May

A good month. May is a solid month to be in Fukuoka. Highs average 24.8 °C, lows 13.9 °C, and rain falls on 10 days — nothing in the month is working against you.

May ranks 3 of 12 in Fukuoka. Only October scores clearly higher, and the difference is small enough to be settled by price rather than weather.

The rain arrives in bursts — 5 of the 10 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

The averages here are honest — no hidden extremes worth planning around. Across the twenty years measured, the hottest May day reached 32 °C and the coldest night fell to 4.6 °C, and the wettest single day dropped 102 mm — roughly 65% of the month's rain in one day.

May is moderately variable: 53 mm in the driest year against 323 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 4.1 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 79%, high enough to notice on the warm days without dominating them.

How May sits in the year

The month is on the way up: 4.9 °C warmer than April, and June adds another 3 °C. Late in the month feels noticeably different from the start of it, which is worth knowing if the trip is short. Rain is the thing that moves: June brings 5 days more of it, so the earlier half of a flexible trip is the safer half.

Daylight in May

May is at or near the longest days of Fukuoka's year: 13.9 hours of daylight, gaining 0.7 hours across the month. Evenings are the real gain — dinner outdoors still happens in full light.

Sea temperature

The sea sits at about 17.8 °C in May — cold — a quick dip rather than a swim, and a wetsuit if you are in for longer. The sea peaks at 27.4 °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 Fukuoka versus nearby

If Fukuoka is one option among several, the nearby comparison is worth making. Kitakyushu is close enough to be a coin toss — 3.7 °C cooler, the same number of rain days. Hiroshima is close enough to be a coin toss — within a degree on temperature, the same number of rain days.

So: May is effectively as good as it gets here — 4 points behind October, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Fukuoka

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