Ibusuki weather in September

In September, Ibusuki sees average daytime highs of 28°C and overnight lows near 23°C, with 224 mm of rain across 15 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 29°C in the first days to 27°C by the end. The sky is clear or mostly clear about 30% 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 Ibusuki's 7th-clearest and 8th-windiest month. For the whole year in context, see Ibusuki's year-round climate.

Daytime high
28°
3rd warmest
Overnight low
23°
10th coldest
Rainfall
224 mm
15 wet days
Daylight
12 h 12 min
6:06 AM – 6:17 PM
Cloud cover
62%
7th clearest
Wind
13 km/h
8th windiest
Solar energy
4.38 kWh/m²
Travel score
5.3
out of 10

Ibusuki is city in Kagoshima Prefecture, Japan.

Density
262/km²
people per km²
Founded
2006

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 29°C in the first days to 27°C by the end.

A typical September day in Ibusuki reaches about 28°C in the afternoon and slips back to 23°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 30°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)
12925
22925
32925
42925
52925
62925
72924
82924
92924
102924
112924
122824
132824
142824
152824
162824
172823
182823
192823
202823
212723
222723
232723
242722
252722
262722
272722
282722
292622
302622

How September really feels in Ibusuki

Once humidity and wind are folded in, September averages 9 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
9
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.

Ibusuki 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° / 888.410.23.5
Feb13° / 108910.93.8
Mar16° / 10°17112.711.84.8
Apr20° / 14°19011.912.75.9
May23° / 18°21011.913.66.4
Jun26° / 22°46920.3144.8
Jul29° / 25°26218.313.84.3
Aug30° / 26°18217.813.14.1
Sep28° / 23°2241512.25.3
Oct24° / 19°1329.611.27.1
Nov19° / 14°1198.910.46.4
Dec15° / 897.4104.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 52%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14753
24753
34753
44654
54654
64654
74654
84753
94753
104753
114852
124852
134951
144951
154951
164951
174951
184951
194852
204852
214951
224852
234852
244852
254951
264951
275050
285050
295050
305050

Chance of precipitation in September

Any precipitation

Ibusuki gets around 224 mm of rain over 15 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 50% and peaks near 60% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
160
260
360
459
558
658
757
856
955
1054
1153
1252
1351
1450
1549
1648
1748
1847
1946
2046
2145
2244
2344
2443
2542
2642
2741
2841
2940
3040

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 40% of days. Sticky, muggy-or-worse air turns up on roughly 83% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
100194941
2001104940
3001115038
4001125136
5001135234
6002145133
7002155231
8013165030
9013185028
10014194927
11015204826
12016214625
13127224523
14129234322
151210244221
161312254119
171313263918
181415263816
191416273715
201518273513
211519283412
221621283311
231622293210
24172329319
25172529308
26182629297
27192729286
282102829275
292102829255
302112929244

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze

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 6:37 PM to 5:59 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:576:37
212.65:586:36
312.65:586:35
412.65:596:33
512.55:596:32
612.56:006:31
712.56:016:29
812.46:016:28
912.46:026:27
1012.46:026:25
1112.36:036:24
1212.36:046:23
1312.36:046:21
1412.36:056:20
1512.26:056:19
1612.26:066:17
1712.26:076:16
1812.16:076:15
1912.16:086:13
2012.16:096:12
2112.06:096:11
2212.06:106:09
2312.06:106:08
2411.96:116:07
2511.96:126:05
2611.96:126:04
2711.86:136:03
2811.86:136:01
2911.86:146:00
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 4.38 kWh/m².

For context, solar energy here swings from a low near 2.57 kWh/m² to a high of 5.3 kWh/m² in July across the year — September's 4.38 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.7Bright
54.7Bright
64.7Bright
74.6Bright
84.6Bright
94.6Bright
104.6Bright
114.5Bright
124.5Bright
134.5Bright
144.5Bright
154.4Bright
164.4Bright
174.4Bright
184.4Bright
194.3Bright
204.3Bright
214.3Bright
224.3Bright
234.2Bright
244.2Bright
254.2Bright
264.2Bright
274.1Bright
284.1Bright
294.1Bright
304.0Bright
Planning a trip in September

Hazard calendar for Ibusuki

In seasonPeak

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

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

Ibusuki'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 Ibusuki?

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

5.3
Sightseeing
5th-best month of the year
6.0
Beach & pool
1st-best month of the year

September is a reasonable time to visit Ibusuki for sightseeing.

What to pack for Ibusuki in September

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

In September, Ibusuki sees daytime highs around 28°C and nights near 23°C. Pack light clothes and rain gear. About 15 days see rain.

light clothesrain gear

Sea temperature near Ibusuki in September

The nearest coast averages about 28°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 28°C and coldest in February near 18°C.

It's comfortable for a long swim from Apr 17 to Jan 2 — about 8.6 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan19Cool
Feb18Cool
Mar19Cool
Apr20Cool
May22Refreshing
Jun24Refreshing
Jul27Warm
Aug28Tropical
Sep28Warm
Oct26Warm
Nov23Refreshing
Dec21Refreshing

UV index in Ibusuki 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 Ibusuki peaks around June 22 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 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 highHighModerateJun 22UV 11Jan 10UV 3
UV index (midday)Level
Jan3Moderate
Feb5High
Mar7High
Apr8Very high
May8Very high
Jun11Extreme
Jul11Extreme
Aug9Very high
Sep10Extreme
Oct7High
Nov5Moderate
Dec4Moderate

Air quality in Ibusuki 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 Ibusuki 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 Ibusuki?

Ibusuki sits at 31.2°N, 130.7°E, 2 m above sea level, in Japan. The nearest listed city is Minamikyushu, 22 km away.

Topography around Ibusuki

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

Within 3 km, the terrain around Ibusuki has significant variations in elevation — a maximum elevation change of 308 m around an average of 29 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 917 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,640 m.

The land around Ibusuki is covered by water (50%) and trees (28%) within 3 km, water (66%) and trees (27%) within 16 km, and water (66%) and trees (29%) within 80 km.

3 km
308 m
16 km
917 m
80 km
1,640 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Minamikyushu 22 km · Kanoya 25 km · Tarumizu 28 km · Makurazaki 32 km · Kaseda-shirakame 38 km · Kagoshima 38 km · Minamisatsuma 39 km · Ijūin 49 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 Ibusuki (31.2333°, 130.65°, elevation 2 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).