Weather in Kagoshima in July
Japan · 20-year averages, July
A hard month. July asks something of you. Go in knowing what. You should expect rain on 19 days of the month, which is more days wet than dry.
July ranks 11 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.
This is wet-season rain: 19 wet days and 8 genuinely heavy ones, which in this climate means concentrated downpours rather than all-day grey. The pattern is usually a clear morning and a loud afternoon, so front-load the day and stop fighting the 3pm hour. Natural fibres and a second shirt for the day. At 86% nothing dries, including you.
What the averages hide
Averages flatten a month, and this one hides a few things: 14 days top 30 °C — hot spells arrive, but they break; the day barely swings — 4.4 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest July day reached 34 °C and the coldest night fell to 20.1 °C, and the wettest single day dropped 149 mm — roughly 39% of the month's rain in one day.
July is moderately variable: 45 mm in the driest year against 935 mm in the wettest, around an average of 378 mm. Roughly two Julys in three land near that average, and the third does something else entirely.
Wind is light at 12.8 km/h, so the temperature on the page is close to the temperature on your skin, and humidity at 86% is the real story though — it is the number that decides how the day feels, not the 29.9 °C.
How July sits in the year
Temperatures hold steady either side: 26.6 °C in June, 29.9 here, 30.9 in August. Nothing about the timing within the month matters much.
Daylight in July
July is at or near the longest days of Kagoshima's year: 14 hours of daylight, losing 0.4 hours across the month. Evenings are the real gain — dinner outdoors still happens in full light.
Sea temperature
The sea sits at about 28.1 °C in July — warm enough that the water offers no relief from the heat. This is the warmest the water gets all year.
How busy it gets
Quiet. Few other visitors, cheaper rooms, and a real chance some seasonal operators are shut.
Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.
July 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, 1 day less rain. Kitakyushu is a better bet in July — 2.1 °C cooler, 1 day less rain.
So: July is a compromise. October is 30 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
| Month | High °C | Low °C | Rain days | Rain mm | Humidity % | Daylight h | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|
| January | 12.6 | 6.3 | 10 | 85 | 77 | 10.3 | 20.8 | 56 |
| February | 14.1 | 7.2 | 11 | 125 | 76 | 11.1 | 20.1 | 58 |
| March | 16.6 | 9.5 | 12 | 158 | 75 | 11.9 | 20.6 | 62 |
| April | 20.5 | 13.6 | 12 | 184 | 76 | 12.9 | 21.4 | 72 |
| May | 24.2 | 17.8 | 13 | 226 | 79 | 13.7 | 23.3 | 71 |
| June | 26.6 | 21.7 | 20 | 550 | 85 | 14.2 | 25.3 | 61 |
| July | 29.9 | 25.5 | 19 | 378 | 86 | 14 | 28.1 | 47 |
| August | 30.9 | 26.3 | 20 | 228 | 82 | 13.3 | 29.2 | 46 |
| September | 28.8 | 23.8 | 17 | 296 | 81 | 12.4 | 28.1 | 56 |
| October | 24.8 | 18.7 | 11 | 154 | 77 | 11.5 | 26.4 | 77 |
| November | 19.8 | 13.5 | 11 | 127 | 76 | 10.6 | 24.4 | 76 |
| December | 14.6 | 8.3 | 10 | 101 | 77 | 10.1 | 22.4 | 63 |
See all twelve months in Kagoshima, or where else to go in July.
Planning the rest of the trip
- Flight time to Kagoshima how long you are actually in the air
- Kagoshima time zone and the difference from home
- Days until your trip count down to the departure date