Weather in Kagoshima in August

A hard month. August is a hard month in Kagoshima, and worth planning around. You should expect rain on 20 days of the month, which is more days wet than dry.

August ranks 12 of 12 — near the bottom of Kagoshima's year. October is the month that works, and the swing between the two is 31 points, which is a different holiday rather than a slightly better one.

Rain on 20 of the month's 31 days, 6 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. 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: 23 days top 30 °C, making the heat continuous rather than occasional; the day barely swings — 4.6 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest August day reached 36.1 °C and the coldest night fell to 20.4 °C, and the wettest single day dropped 128 mm — roughly 56% of the month's rain in one day.

August is moderately variable: 76 mm in the driest year against 471 mm in the wettest, around an average of 228 mm. Roughly two Augusts in three land near that average, and the third does something else entirely.

Wind is light at 13 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 August sits in the year

This is a turning point in the year — July and September sit on opposite sides of it, so the month contains the change rather than following it.

Daylight in August

13.3 hours of daylight, losing 0.8 hours across the month. That is between Kagoshima's extremes of 14.2 and 10.1 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 29.2 °C in August — 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.

August in Kagoshima versus nearby

If Kagoshima is one option among several, the nearby comparison is worth making. Fukuoka is close enough to be a coin toss — within a degree on temperature, 4 days less rain. Kitakyushu is close enough to be a coin toss — within a degree on temperature, 4 days less rain.

So: August is a compromise. October is 31 points better and is what Kagoshima 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 Kagoshima

See all twelve months in Kagoshima, or where else to go in August.