Kagoshima weather in September

In September, Kagoshima sees average daytime highs of 29°C and overnight lows near 23°C, with 202 mm of rain across 14.7 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 30°C in the first days to 27°C by the end. The sky is clear or mostly clear about 27% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 42 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Kagoshima's 6th-clearest and 12th-windiest month. For the whole year in context, see Kagoshima's year-round climate.

Daytime high
29°
3rd warmest
Overnight low
23°
10th coldest
Rainfall
202 mm
14.7 wet days
Daylight
12 h 12 min
6:06 AM – 6:18 PM
Cloud cover
62%
6th clearest
Wind
9 km/h
12th windiest
Solar energy
4.24 kWh/m²
Travel score
4.9
out of 10

Kagoshima is capital city of Kagoshima prefecture.

Founded
1889

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 30°C in the first days to 27°C by the end.

A typical September day in Kagoshima reaches about 29°C in the afternoon and slips back to 23°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 31°C. Set against its neighbours, September runs about 2°C cooler than August and about 4°C warmer than October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13025
23025
33024
43024
53024
63024
73024
83024
93024
103024
113024
123024
132923
142923
152923
162923
172923
182923
192922
202922
212822
222822
232822
242822
252822
262821
272821
282721
292721
302721

How September really feels in Kagoshima

Once humidity and wind are folded in, September averages 14 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
14
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Kagoshima weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan12° / 82910.23.4
Feb13° / 1029.610.83.7
Mar16° / 15412.911.84.9
Apr21° / 13°17611.612.86.0
May24° / 17°19711.613.66.4
Jun27° / 21°48819.8144.7
Jul30° / 25°30019.913.83.7
Aug31° / 25°16717.213.23.6
Sep29° / 23°20214.712.24.9
Oct25° / 18°110911.27.1
Nov20° / 12°1128.910.46.4
Dec14° / 857.7104.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 53%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14654
24654
34654
44654
54654
64654
74654
84654
94555
104654
114654
124753
134753
144852
154852
164852
174852
184951
194951
204951
214852
224951
234852
244852
255050
264951
274951
284951
295050
305050

Chance of precipitation in September

Any precipitation

Kagoshima gets around 202 mm of rain over 14.7 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 48% and peaks near 58% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
158
258
358
457
557
656
756
855
954
1054
1153
1252
1351
1449
1548
1648
1747
1846
1945
2044
2143
2243
2342
2441
2540
2640
2739
2839
2938
3038

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the oppressive band about 41% of days. Sticky, muggy-or-worse air turns up on roughly 82% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1001125235
2001135234
3001145332
4001155430
5002165329
6002165527
7013175326
8013185424
9014195323
10015205222
11026215021
12127224920
13138234719
14139234618
151411244416
161412254215
171513264114
181515273913
192616273712
202618283611
212719293410
22272029339
23282130318
24282331297
25292431286
26292531276
272102631265
282112731255
293112731234
303122831224

Wind in September

Winds average 9 km/h in September, the calmest month.

Across September, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 42 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over September. Sunrise moves from 5:57 AM to 6:15 AM, and sunset from 6:38 PM to 5:59 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:576:38
212.65:586:37
312.65:586:35
412.65:596:34
512.56:006:33
612.56:006:31
712.56:016:30
812.56:026:29
912.46:026:27
1012.46:036:26
1112.46:036:25
1212.36:046:23
1312.36:056:22
1412.36:056:21
1512.26:066:19
1612.26:066:18
1712.26:076:16
1812.16:086:15
1912.16:086:14
2012.16:096:12
2112.06:106:11
2212.06:106:10
2312.06:116:08
2411.96:116:07
2511.96:126:06
2611.96:136:04
2711.86:136:03
2811.86:146:02
2911.86:156:00
3011.76:155:59

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.24 kWh/m².

For context, solar energy here swings from a low near 2.47 kWh/m² to a high of 5.06 kWh/m² in May across the year — September's 4.24 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.6Bright
34.5Bright
44.5Bright
54.5Bright
64.5Bright
74.5Bright
84.4Bright
94.4Bright
104.4Bright
114.4Bright
124.4Bright
134.3Bright
144.3Bright
154.3Bright
164.3Bright
174.3Bright
184.2Bright
194.2Bright
204.2Bright
214.2Bright
224.2Bright
234.1Bright
244.1Bright
254.1Bright
264.1Bright
274.0Bright
284.0Bright
294.0Bright
304.0Moderate
Planning a trip in September

Hazard calendar for Kagoshima

In seasonPeak

In September, Kagoshima sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

Kagoshima sits in the Pacific typhoon belt; the season peaks July–October.

Kagoshima's rainy season runs June–July, when most of the year's rain falls.

Pacific typhoon
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Kagoshima?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

4.9
Sightseeing
5th-best month of the year
6.1
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Kagoshima for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Kagoshima in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Kagoshima sees daytime highs around 29°C and nights near 23°C. Pack light clothes and rain gear. About 15 days see rain.

light clothesrain gear

Sea temperature near Kagoshima in September

The nearest coast averages about 27°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 22 km away) is warmest in August at about 28°C and coldest in February near 18°C.

It's comfortable for a long swim from Apr 24 to Dec 26 — about 8.1 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan19Cool
Feb18Cool
Mar18Cool
Apr20Cool
May21Refreshing
Jun24Refreshing
Jul27Warm
Aug28Tropical
Sep27Warm
Oct25Warm
Nov23Refreshing
Dec21Refreshing

UV index in Kagoshima in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Kagoshima peaks around July 10 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJul 10UV 11Dec 23UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar7High
Apr8Very high
May8Very high
Jun11Extreme
Jul11Extreme
Aug9Very high
Sep10Very high
Oct6High
Nov5Moderate
Dec3Moderate

Air quality in Kagoshima in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Kagoshima is worst in April — around 23 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (October, 12 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1423 µg/m³Oct 1012 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb19Moderate
Mar22Moderate
Apr23Moderate
May21Moderate
Jun17Moderate
Jul12Moderate
Aug14Moderate
Sep12Moderate
Oct12Moderate
Nov14Moderate
Dec13Moderate
Location & terrain

Where is Kagoshima?

Kagoshima sits at 31.6°N, 130.6°E, 6 m above sea level, in Japan. The nearest listed city is Ijūin, 15 km away.

Topography around Kagoshima

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Kagoshima.

Within 3 km, the terrain around Kagoshima has only modest variations in elevation — a maximum elevation change of 131 m around an average of 19 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,097 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,641 m.

The land around Kagoshima is covered by artificial surfaces (63%) and water (28%) within 3 km, trees (49%) and water (35%) within 16 km, and water (50%) and trees (43%) within 80 km.

3 km
131 m
16 km
1,097 m
80 km
1,641 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Ijūin 15 km · Tarumizu 17 km · Umeki 19 km · Kajiki 22 km · Aira 23 km · Hamanoichi 24 km · Minamikyushu 26 km · Kokubu-matsuki 28 km

Japan travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B
100 V · 50 / 60 Hz
Prices
≈ 65% of US
price level, 2025
GDP per capita
$35,951
2025
Happiness
6.1 / 10
World Happiness, 2025
Safe drinking water
99%
of population, 2024
Homicide rate
0.2
per 100k, 2023
Road deaths
3.6
per 100k/yr, 2019
Income group
High
World Bank
English
Very low
EF EPI 446
Religion
Shintoism 49%Buddhism 46%other 4%Christianity 1%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Kagoshima (31.5667°, 130.55°, elevation 6 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).