Shima weather in September

In September, Shima sees average daytime highs of 26°C and overnight lows near 23°C, with 250 mm of rain across 15.2 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 28°C in the first days to 25°C by the end. The sky is clear or mostly clear about 33% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 48 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Shima's 9th-clearest and 8th-windiest month. For the whole year in context, see Shima's year-round climate.

Daytime high
26°
3rd warmest
Overnight low
23°
10th coldest
Rainfall
250 mm
15.2 wet days
Daylight
12 h 12 min
5:41 AM – 5:53 PM
Cloud cover
60%
9th clearest
Wind
16 km/h
8th windiest
Solar energy
4.43 kWh/m²
Travel score
5.8
out of 10

Shima is city in Mie Prefecture, Japan.

Density
267/km²
people per km²
Founded
2004

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 28°C in the first days to 25°C by the end.

A typical September day in Shima reaches about 26°C in the afternoon and slips back to 23°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 28°C. Set against its neighbours, September runs about 2°C cooler than August and about 4°C warmer than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12825
22825
32825
42825
52825
62825
72724
82724
92724
102724
112724
122724
132724
142724
152723
162623
172623
182623
192623
202623
212623
222622
232522
242522
252522
262522
272522
282521
292521
302421

How September really feels in Shima

Once humidity and wind are folded in, September averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Shima weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan10° / 796.2102.8
Feb11° / 827.510.72.9
Mar14° / 14410.711.74.0
Apr18° / 13°14910.412.85.6
May21° / 17°17411.513.86.2
Jun24° / 21°25014.414.25.7
Jul27° / 25°1911414.15.6
Aug29° / 26°1381313.35.3
Sep26° / 23°25015.212.25.8
Oct22° / 19°27713.211.16.3
Nov18° / 14°1249.510.25.9
Dec13° / 786.99.74.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 54%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14852
24852
34852
44852
54852
64852
74753
84654
94654
104654
114753
124753
134753
144753
154654
164555
174555
184654
194555
204456
214456
224456
234555
244456
254456
264456
274555
284555
294555
304555

Chance of precipitation in September

Any precipitation

Shima gets around 250 mm of rain over 15.2 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 51% and peaks near 52% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
151
251
351
452
552
652
752
852
952
1052
1152
1251
1351
1451
1550
1650
1750
1850
1950
2050
2150
2249
2349
2449
2549
2649
2750
2850
2951
3051

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 32% of days. Sticky, muggy-or-worse air turns up on roughly 75% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1013204234
2013214332
3014224331
4024234329
5024244328
6025244226
7025254225
8026264223
9037274122
10038284120
11039294019
121410293918
131411303816
141413303715
151514313614
162515313412
172617323311
182718323110
19371932309
20382132288
21492232267
22592332256
235102432235
246112632224
256122732203
267132831193
277142831172
288152931162
298163030151
309173029131

Wind in September

Winds average 16 km/h in September.

Across September, daily wind ranges from about 15 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2418light breeze
2518light breeze
2618light breeze
2718light breeze
2818light breeze
2918light breeze
3018light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 48 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 66 minutes over September. Sunrise moves from 5:30 AM to 5:51 AM, and sunset from 6:15 PM to 5:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:306:15
212.75:316:14
312.75:316:12
412.65:326:11
512.65:336:09
612.65:336:08
712.55:346:06
812.55:356:05
912.55:366:04
1012.45:366:02
1112.45:376:01
1212.45:385:59
1312.35:385:58
1412.35:395:56
1512.25:405:55
1612.25:415:53
1712.25:415:52
1812.15:425:50
1912.15:435:49
2012.15:445:47
2112.05:445:46
2212.05:455:44
2312.05:465:43
2411.95:475:42
2511.95:475:40
2611.85:485:39
2711.85:495:37
2811.85:505:36
2911.75:505:34
3011.75:515:33

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.43 kWh/m².

For context, solar energy here swings from a low near 2.64 kWh/m² to a high of 5.67 kWh/m² in May across the year — September's 4.43 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.0Bright
35.0Bright
44.9Bright
54.9Bright
64.8Bright
74.8Bright
84.8Bright
94.7Bright
104.7Bright
114.6Bright
124.6Bright
134.5Bright
144.5Bright
154.5Bright
164.4Bright
174.4Bright
184.3Bright
194.3Bright
204.2Bright
214.2Bright
224.2Bright
234.1Bright
244.1Bright
254.0Bright
264.0Bright
274.0Moderate
283.9Moderate
293.9Moderate
303.9Moderate
Planning a trip in September

Hazard calendar for Shima

In seasonPeak

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

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

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

Is September a good time to visit Shima?

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

5.8
Sightseeing
4th-best month of the year
5.7
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Shima for sightseeing.

What to pack for Shima in September

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

In September, Shima sees daytime highs around 26°C and nights near 23°C. Pack rain gear. Worth having: light clothes. About 15 days see rain.

rain gearlight clothes

Sea temperature near Shima in September

The nearest coast averages about 26°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 23 km away) is warmest in August at about 27°C and coldest in February near 16°C.

It's comfortable for a long swim from May 20 to Dec 2 — about 6.5 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan17Cool
Feb16Cool
Mar17Cool
Apr18Cool
May20Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct24Refreshing
Nov21Refreshing
Dec19Cool

UV index in Shima in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Shima peaks around July 13 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 13UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7High
May8Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Shima 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 Shima is worst in March — around 26 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (July, 16 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2326 µg/m³Jul 2316 µg/m³
PM2.5 (µg/m³)Level
Jan19Moderate
Feb21Moderate
Mar26Moderate
Apr26Moderate
May24Moderate
Jun20Moderate
Jul16Moderate
Aug16Moderate
Sep17Moderate
Oct19Moderate
Nov21Moderate
Dec18Moderate
Location & terrain

Where is Shima?

Shima sits at 34.3°N, 136.8°E, 11 m above sea level, in Japan. The nearest listed city is Toba, 17 km away.

Topography around Shima

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

Within 3 km, the terrain around Shima has only modest variations in elevation — a maximum elevation change of 143 m around an average of 23 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 555 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,684 m.

The land around Shima is covered by trees (69%) within 3 km, water (53%) and trees (42%) within 16 km, and water (53%) and trees (34%) within 80 km.

3 km
143 m
16 km
555 m
80 km
1,684 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Toba 17 km · Ise 21 km · Tamaru 25 km · Saikū 29 km · Matsusaka 39 km · Minamichita 41 km · Toyohama 43 km · Hisai-motomachi 50 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 Shima (34.3333°, 136.8333°, 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).