Miyakojima weather in September

In September, Miyakojima sees average daytime highs of 28°C and overnight lows near 27°C, with 189 mm of rain across 15.1 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 38% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 30 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Miyakojima's 2nd-clearest and 7th-windiest month. For the whole year in context, see Miyakojima's year-round climate.

Daytime high
28°
3rd warmest
Overnight low
27°
10th coldest
Rainfall
189 mm
15.1 wet days
Daylight
12 h 06 min
6:29 AM – 6:37 PM
Cloud cover
57%
2nd clearest
Wind
25 km/h
7th windiest
Solar energy
5.25 kWh/m²
Travel score
5.4
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical September day in Miyakojima reaches about 28°C in the afternoon and slips back to 27°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 29°C. Set against its neighbours, September runs about 1°C cooler than August and about 2°C warmer than October.

24°26°28°30°32°151015202530
Avg high (°C)Avg low (°C)
12927
22927
32927
42827
52827
62827
72827
82827
92827
102827
112827
122827
132827
142827
152827
162827
172827
182827
192827
202827
212827
222827
232827
242826
252826
262826
272826
282726
292726
302726

How September really feels in Miyakojima

Once humidity and wind are folded in, September averages 17 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
17
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.

Miyakojima 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
Jan20° / 18°12914.610.65.5
Feb21° / 19°10412.311.15.7
Mar22° / 20°11712.811.86.1
Apr24° / 22°14012.612.66.4
May26° / 24°18214.313.25.9
Jun28° / 27°16914.313.55.3
Jul29° / 28°13512.813.45.2
Aug29° / 28°21316.412.94.8
Sep28° / 27°18915.112.25.4
Oct26° / 25°13412.111.46.4
Nov24° / 23°12412.910.86.4
Dec22° / 20°13312.510.56.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 38% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 46%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15248
25149
35149
45149
55248
65248
75149
85149
95248
105248
115248
125248
135248
145347
155347
165347
175446
185446
195446
205545
215545
225545
235644
245743
255743
265743
275842
285842
295842
305842

Chance of precipitation in September

Any precipitation

Miyakojima gets around 189 mm of rain over 15.1 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 49% and peaks near 54% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
154
254
354
454
554
654
753
853
952
1052
1151
1251
1350
1450
1550
1650
1749
1849
1949
2048
2147
2247
2346
2446
2545
2645
2744
2844
2944
3043

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the miserable band about 64% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1021682
2021682
3021781
4021880
5031879
6031879
7031978
8031978
9141976
10142075
11152074
12152074
13262072
14272170
15272170
16382267
17392464
183102562
194112659
204122856
214132954
224143052
234153149
244153347
255163445
265163544
275173642
285183741
295183739
305183838

Wind in September

Winds average 25 km/h in September.

Across September, daily wind ranges from about 22 km/h on the calmest days to 27 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202530
Wind speed (km/h)Feels
122breezy
222breezy
322breezy
423breezy
523breezy
623breezy
723breezy
823breezy
924breezy
1024breezy
1124breezy
1224breezy
1325breezy
1425breezy
1525breezy
1625breezy
1726breezy
1826breezy
1926breezy
2026breezy
2126breezy
2226breezy
2326breezy
2427breezy
2527breezy
2627breezy
2727breezy
2827breezy
2927breezy
3027breezy

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 30 min at the start of September to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 42 minutes over September. Sunrise moves from 6:23 AM to 6:34 AM, and sunset from 6:54 PM to 6:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.56:236:54
212.56:246:53
312.56:246:52
412.46:246:51
512.46:256:49
612.46:256:48
712.46:256:47
812.36:266:46
912.36:266:45
1012.36:276:44
1112.36:276:43
1212.26:276:42
1312.26:286:41
1412.26:286:40
1512.26:286:38
1612.16:296:37
1712.16:296:36
1812.16:306:35
1912.16:306:34
2012.06:306:33
2112.06:316:32
2212.06:316:31
2312.06:316:30
2411.96:326:28
2511.96:326:27
2611.96:336:26
2711.96:336:25
2811.86:336:24
2911.86:346:23
3011.86:346:22

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.25 kWh/m².

For context, solar energy here swings from a low near 2.48 kWh/m² to a high of 6.38 kWh/m² in July across the year — September's 5.25 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.6Bright
45.5Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.4Bright
105.4Bright
115.4Bright
125.3Bright
135.3Bright
145.3Bright
155.3Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.1Bright
215.1Bright
225.1Bright
235.1Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
284.9Bright
294.9Bright
304.9Bright
Planning a trip in September

Hazard calendar for Miyakojima

In seasonPeak

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

Miyakojima 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 Miyakojima?

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

5.4
Sightseeing
9th-best month of the year
6.1
Beach & pool
3rd-best month of the year

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

What to pack for Miyakojima in September

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

In September, Miyakojima sees daytime highs around 28°C and nights near 27°C. Pack light clothes and rain gear. Worth having: sun protection and a windbreaker. About 15 days see rain.

light clothesrain gearsun protectiona windbreaker

Sea temperature near Miyakojima 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 29°C and coldest in February near 23°C.

The water stays above 20°C all year — warm enough for a swim any month.

22°24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan23Refreshing
Feb23Refreshing
Mar23Refreshing
Apr24Warm
May26Warm
Jun28Warm
Jul29Tropical
Aug29Tropical
Sep28Tropical
Oct27Warm
Nov26Warm
Dec24Warm

UV index in Miyakojima in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Miyakojima peaks around June 20 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighJun 20UV 12Dec 21UV 5
UV index (midday)Level
Jan6High
Feb8Very high
Mar10Very high
Apr9Very high
May10Very high
Jun12Extreme
Jul12Extreme
Aug12Extreme
Sep11Extreme
Oct8Very high
Nov7High
Dec5High

Air quality in Miyakojima 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 Miyakojima is worst in March — around 16 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (June, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodMar 1816 µg/m³Jun 217 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb13Moderate
Mar16Moderate
Apr14Moderate
May10Good
Jun7Good
Jul8Good
Aug8Good
Sep8Good
Oct10Good
Nov10Good
Dec11Good
Location & terrain

Where is Miyakojima?

Miyakojima sits at 24.8°N, 125.3°E, 36 m above sea level, in Japan. The nearest listed city is Hirara, 2.0 km away.

ItomanTomigusukuNahaYaeseKanegusukuNanjō

Topography around Miyakojima

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

Within 3 km, the terrain around Miyakojima has only modest variations in elevation — a maximum elevation change of 103 m around an average of 39 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 114 m; within 80 km, only modest variations in elevation — a maximum elevation change of 110 m.

The land around Miyakojima is covered by trees (33%) and cropland (32%) within 3 km, water (77%) within 16 km, and water (98%) within 80 km.

3 km
103 m
16 km
114 m
80 km
110 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Hirara 2.0 km · Ishigaki 127 km · Itoman 280 km · Tomigusuku 284 km · Naha 285 km · Yaese 286 km · Kanegusuku 288 km · Nanjō 289 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 Miyakojima (24.7902°, 125.3111°, elevation 36 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).