Shibushi weather in September

In September, Shibushi sees average daytime highs of 28°C and overnight lows near 22°C, with 244 mm of rain across 16.9 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 24% 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 Shibushi's 9th-clearest and 10th-windiest month. For the whole year in context, see Shibushi's year-round climate.

Daytime high
28°
3rd warmest
Overnight low
22°
10th coldest
Rainfall
244 mm
16.9 wet days
Daylight
12 h 12 min
6:04 AM – 6:16 PM
Cloud cover
65%
9th clearest
Wind
9 km/h
10th windiest
Solar energy
4.29 kWh/m²
Travel score
4.9
out of 10

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 Shibushi reaches about 28°C in the afternoon and slips back to 22°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 30°C. Set against its neighbours, September runs about 3°C cooler than August and about 4°C warmer than October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13024
23024
33024
43024
52923
62923
72923
82923
92923
102923
112923
122923
132923
142822
152822
162822
172822
182822
192822
202822
212821
222721
232721
242721
252721
262721
272720
282720
292620
302620

How September really feels in Shibushi

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.

Shibushi 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° / 837.510.23.4
Feb13° / 1028.610.93.8
Mar16° / 16212.511.84.9
Apr20° / 12°1831212.75.9
May24° / 16°20712.313.66.3
Jun26° / 20°45020.8144.7
Jul30° / 24°26620.113.83.7
Aug31° / 25°20419.713.13.6
Sep28° / 22°24416.912.24.9
Oct24° / 17°14310.211.26.9
Nov19° / 11°1118.810.46.4
Dec14° / 836.7104.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% 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 58%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14159
24159
34159
44060
54060
64060
74060
84060
94060
104060
114159
124159
134258
144357
154258
164357
174357
184357
194357
204258
214258
224357
234357
244456
254456
264456
274555
284555
294456
304555

Chance of precipitation in September

Any precipitation

Shibushi gets around 244 mm of rain over 16.9 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 56% and peaks near 68% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
168
267
367
466
566
665
764
863
962
1061
1160
1259
1357
1456
1555
1654
1753
1852
1951
2051
2150
2249
2348
2448
2547
2646
2746
2845
2945
3044

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 79% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1002155627
2002165626
3002175724
4002185723
5012195622
6012205720
7013215619
8013225618
9024235417
10124245316
11135255016
12136264915
13147264714
14149274513
152510274313
162512284112
172614284011
182715283810
19271728369
20281828349
21392029328
22392129317
233102229297
243112329286
253122429265
263132529255
273142629244
283152729234
293162729213
304172729203

Wind in September

Winds average 9 km/h in September.

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 5:55 AM to 6:13 AM, and sunset from 6:36 PM to 5:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:556:36
212.65:566:34
312.65:566:33
412.65:576:32
512.55:586:30
612.55:586:29
712.55:596:28
812.55:596:26
912.46:006:25
1012.46:016:24
1112.46:016:22
1212.36:026:21
1312.36:026:20
1412.36:036:18
1512.26:046:17
1612.26:046:16
1712.26:056:14
1812.16:056:13
1912.16:066:12
2012.16:076:10
2112.06:076:09
2212.06:086:07
2312.06:096:06
2411.96:096:05
2511.96:106:03
2611.96:106:02
2711.86:116:01
2811.86:125:59
2911.86:125:58
3011.76:135:57

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.29 kWh/m².

For context, solar energy here swings from a low near 2.69 kWh/m² to a high of 5.22 kWh/m² in July across the year — September's 4.29 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.6Bright
54.6Bright
64.6Bright
74.5Bright
84.5Bright
94.5Bright
104.5Bright
114.4Bright
124.4Bright
134.4Bright
144.4Bright
154.3Bright
164.3Bright
174.3Bright
184.3Bright
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 Shibushi

In seasonPeak

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

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

Shibushi's rainy season runs May–September, 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 Shibushi?

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
5.7
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Shibushi for sightseeing.

What to pack for Shibushi in September

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

In September, Shibushi sees daytime highs around 28°C and nights near 22°C. Pack light clothes and rain gear. About 17 days see rain.

light clothesrain gear

Sea temperature near Shibushi 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 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 14 to Jan 4 — about 8.7 months when the water holds above 20°C.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan19Cool
Feb18Cool
Mar19Cool
Apr20Refreshing
May22Refreshing
Jun24Refreshing
Jul27Warm
Aug28Tropical
Sep27Warm
Oct26Warm
Nov23Refreshing
Dec21Refreshing

UV index in Shibushi 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 Shibushi peaks around June 22 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 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 1UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar7High
Apr8Very high
May8Very high
Jun11Extreme
Jul11Extreme
Aug10Very high
Sep10Very high
Oct6High
Nov5Moderate
Dec3Moderate

Air quality in Shibushi 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 Shibushi is worst in April — around 22 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (July, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodGoodModerateApr 1421 µg/m³Sep 1911 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb18Moderate
Mar21Moderate
Apr22Moderate
May20Moderate
Jun16Moderate
Jul11Good
Aug12Moderate
Sep11Good
Oct12Good
Nov13Moderate
Dec12Moderate
Location & terrain

Where is Shibushi?

Shibushi sits at 31.5°N, 131.1°E, 11 m above sea level, in Japan. The nearest listed city is Kushima, 13 km away.

Topography around Shibushi

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

Within 3 km, the terrain around Shibushi has only modest variations in elevation — a maximum elevation change of 248 m around an average of 32 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 524 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,640 m.

The land around Shibushi is covered by trees (36%), water (29%) and artificial surfaces (21%) within 3 km, trees (51%) and water (30%) within 16 km, and water (47%) and trees (44%) within 80 km.

3 km
248 m
16 km
524 m
80 km
1,640 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Kushima 13 km · Sueyoshichō-ninokata 21 km · Soo 22 km · Kanoya 26 km · Nichinan 29 km · Miyakonojō 29 km · Mochibaru 31 km · Tarumizu 38 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 Shibushi (31.476°, 131.1011°, elevation 11 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).