Kagoshima climate

Name: Kagoshima
Address: JP

Kagoshima is warmest in August, with average highs of 30 °C, and coldest in January, when nights average 5.8 °C. June is the wettest month (492 mm) and December the driest (85 mm). Figures are 1991–2020 climate normals.

Across a full year Kagoshima averages 2,212 mm of rain, 128 days above 25 °C and 1 days below freezing.

Japan · population 595,049 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month August 30 °C
Coldest month January 5.8 °C
Driest month December 85 mm
Wettest month June 492 mm
Least cloud October 48 % cloud
Hottest on record August 35 °C
Coldest on record February -2.4 °C
Warmest sea August 28 °C

What to expectKagoshima through the year

Kagoshima has a clear annual cycle: average daily highs run from 11 °C in January to 30 °C in August, a swing of 19 °C in mean temperature across the year.

Counted across a normal year, 128 days a year reach 25 °C, 38 of them reach 30 °C, 1 nights drop below freezing. The warmest reading in the 1991–2020 record is 35 °C, in August.

Rain is strongly seasonal. June averages 492 mm against 85 mm in December — 5.8 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Kagoshima is warmest in August at 28 °C and coldest in February at 18 °C. Sea temperature lags the air by a month or two, which is why late summer swims warmer than early summer at the same air temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	11.2 °C	86 mm	60 %
February	12.3 °C	107 mm	61 %
March	15.3 °C	154 mm	64 %
April	19.5 °C	181 mm	66 %
May	23.5 °C	192 mm	71 %
June	25.9 °C	492 mm	84 %
July	29.4 °C	313 mm	71 %
August	30.3 °C	173 mm	62 %
September	28.1 °C	204 mm	60 %
October	23.8 °C	111 mm	48 %
November	18.6 °C	114 mm	51 %
December	13.3 °C	85 mm	54 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	11.2 °C	5.8 °C	8.3 °C	19.5 °C	-2.3 °C	0	0
February	12.3 °C	6.2 °C	9.1 °C	21.3 °C	-2.4 °C	0	0
March	15.3 °C	8.8 °C	11.8 °C	24.5 °C	1.3 °C	0	0
April	19.5 °C	12.6 °C	15.8 °C	27.0 °C	4.0 °C	0	0
May	23.5 °C	16.8 °C	19.8 °C	30.3 °C	9.0 °C	8	0
June	25.9 °C	20.9 °C	23.1 °C	30.8 °C	15.0 °C	20	0
July	29.4 °C	24.5 °C	26.6 °C	35.0 °C	18.2 °C	30	14
August	30.3 °C	25.2 °C	27.4 °C	35.4 °C	21.5 °C	31	19
September	28.1 °C	22.8 °C	25.1 °C	32.6 °C	15.8 °C	28	5
October	23.8 °C	17.9 °C	20.5 °C	30.6 °C	8.1 °C	11	0
November	18.6 °C	12.8 °C	15.4 °C	26.0 °C	3.5 °C	0	0
December	13.3 °C	7.8 °C	10.4 °C	21.9 °C	-0.5 °C	0	0

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	86 mm	9	10 h/day	60 %	74 %	18 km/h	18.8 °C
February	107 mm	10	11 h/day	61 %	74 %	18 km/h	17.8 °C
March	154 mm	13	12 h/day	64 %	75 %	18 km/h	18.3 °C
April	181 mm	11	13 h/day	66 %	78 %	17 km/h	19.5 °C
May	192 mm	12	14 h/day	71 %	81 %	15 km/h	21.4 °C
June	492 mm	20	14 h/day	84 %	87 %	15 km/h	23.7 °C
July	313 mm	19	14 h/day	71 %	87 %	15 km/h	26.5 °C
August	173 mm	17	13 h/day	62 %	84 %	15 km/h	28.2 °C
September	204 mm	14	12 h/day	60 %	81 %	14 km/h	27.4 °C
October	111 mm	9	11 h/day	48 %	77 %	14 km/h	25.3 °C
November	114 mm	9	11 h/day	51 %	77 %	15 km/h	22.8 °C
December	85 mm	8	10 h/day	54 %	74 %	17 km/h	20.6 °C

How Kagoshima compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Kagoshima	30 °C	5.8 °C	2,212 mm	128
Miyakonojō · Japan	30 °C	3.0 °C	2,241 mm	122
Miyazaki · Japan	30 °C	5.3 °C	2,257 mm	113
Kumamoto · Japan	30 °C	3.0 °C	1,953 mm	118

Planning a trip? See the best time to visit Kagoshima.

QuestionsCommon questions about Kagoshima’s climate

When is the best time to visit Kagoshima?

That depends on what you want, so the honest answer is a comparison rather than a single month. May, June, October sit closest to 20 °C on average, August is the warmest month and December the driest. The month-by-month table above has the full picture.

How hot does Kagoshima get?

In August, the warmest month, daily highs average 30 °C. About 38 days a year pass 30 °C. The highest value in the 1991–2020 record is 35 °C.

How cold does it get in winter?

Nights average 5.8 °C in January, the coldest month. A normal year has 1 nights below freezing.

Which month is wettest in Kagoshima?

June, averaging 492 mm over 20 days with rain. The driest month is December with 85 mm. The year as a whole averages 2,212 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Kagoshima rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.