Weather in Kitakyushu in May

A good month. May is a solid month to be in Kitakyushu. Highs average 21.1 °C, lows 15.8 °C, and rain falls on 10 days — nothing in the month is working against you.

May ranks 2 of 12 in Kitakyushu. 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

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; the day barely swings — 5.3 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest May day reached 27.4 °C and the coldest night fell to 9.5 °C, and the wettest single day dropped 97 mm — roughly 62% of the month's rain in one day.

May is moderately variable: 54 mm in the driest year against 314 mm in the wettest, around an average of 156 mm. Roughly two Mays in three land near that average, and the third does something else entirely.

Wind is light at 12.4 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: 4.2 °C warmer than April, and June adds another 3.2 °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 Kitakyushu'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 Kitakyushu versus nearby

If Kitakyushu is one option among several, the nearby comparison is worth making. Fukuoka is close enough to be a coin toss — 3.7 °C warmer, the same number of rain days. Hiroshima is close enough to be a coin toss — 2.9 °C warmer, 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 Kitakyushu

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