Minamiawaji weather in September

In September, Minamiawaji sees average daytime highs of 26°C and overnight lows near 24°C, with 195 mm of rain across 12 wet days and about 12.2 hours of daylight. It is the 2nd-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 27°C in the first days to 24°C by the end. The sky is clear or mostly clear about 37% 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 Minamiawaji's 6th-clearest and 8th-windiest month. For the whole year in context, see Minamiawaji's year-round climate.

Daytime high
26°
2nd warmest
Overnight low
24°
10th coldest
Rainfall
195 mm
12 wet days
Daylight
12 h 12 min
5:49 AM – 6:02 PM
Cloud cover
57%
6th clearest
Wind
19 km/h
8th windiest
Solar energy
4.24 kWh/m²
Travel score
6.5
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 27°C in the first days to 24°C by the end.

A typical September day in Minamiawaji reaches about 26°C in the afternoon and slips back to 24°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 27°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)
12725
22725
32725
42725
52725
62725
72725
82725
92725
102624
112624
122624
132624
142624
152624
162624
172623
182623
192523
202523
212523
222523
232523
242522
252522
262522
272422
282422
292422
302422

Minamiawaji weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan10° / 7410.9102.3
Feb11° / 791110.72.4
Mar13° / 11512.111.73.5
Apr16° / 13°12310.212.85.1
May19° / 17°1501013.86.1
Jun22° / 21°21212.814.25.9
Jul26° / 24°17310.814.16.5
Aug27° / 26°937.513.36.8
Sep26° / 24°1951212.26.5
Oct22° / 19°18610.511.16.7
Nov17° / 14°918.310.25.8
Dec13° / 10°799.69.83.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% 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 50%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15149
25149
35050
45050
55050
64951
75050
85050
95050
105050
115050
125050
135050
145050
155050
165050
175050
185050
195050
205050
215050
225149
235050
245149
255149
265149
275248
285248
295248
305248

Chance of precipitation in September

Any precipitation

Minamiawaji gets around 195 mm of rain over 12 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 39% and peaks near 40% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
135
236
337
438
538
639
739
840
940
1040
1140
1239
1339
1439
1538
1638
1738
1838
1938
2038
2138
2238
2339
2439
2539
2639
2739
2840
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 30% of days. Sticky, muggy-or-worse air turns up on roughly 71% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1006204034
2006214132
3017224130
4017244028
5018254026
6018264025
7019273923
80210293921
90211303819
100311313718
110312323716
120414323614
131415323513
141516333411
151618333210
16171933319
17282132298
18292233286
192102432276
203102532255
213112631244
224122830233
234132929213
244143129202
255153228182
265163327172
276163427161
287173526141
297183625131
308193624121

Wind in September

Winds average 19 km/h in September.

Across September, daily wind ranges from about 18 km/h on the calmest days to 20 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
719light breeze
819light breeze
919light breeze
1019light breeze
1119light breeze
1219light breeze
1319light breeze
1419light breeze
1519light breeze
1619light breeze
1720light breeze
1820light breeze
1920light breeze
2020light breeze
2120light breeze
2220light breeze
2320light breeze
2420light breeze
2520breezy
2620breezy
2720breezy
2820breezy
2920breezy
3020breezy

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 5:38 AM to 5:59 AM, and sunset from 6:23 PM to 5:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:386:23
212.75:396:22
312.75:406:20
412.65:406:19
512.65:416:18
612.65:426:16
712.55:426:15
812.55:436:13
912.55:446:12
1012.45:456:10
1112.45:456:09
1212.45:466:07
1312.35:476:06
1412.35:476:04
1512.25:486:03
1612.25:496:02
1712.25:506:00
1812.15:505:59
1912.15:515:57
2012.15:525:56
2112.05:535:54
2212.05:535:53
2312.05:545:51
2411.95:555:50
2511.95:555:48
2611.85:565:47
2711.85:575:45
2811.85:585:44
2911.75:595:43
3011.75:595:41

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 2.45 kWh/m² to a high of 5.56 kWh/m² in May across the year — September's 4.24 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.7Bright
44.7Bright
54.6Bright
64.6Bright
74.6Bright
84.5Bright
94.5Bright
104.5Bright
114.4Bright
124.4Bright
134.3Bright
144.3Bright
154.3Bright
164.2Bright
174.2Bright
184.2Bright
194.1Bright
204.1Bright
214.1Bright
224.0Bright
234.0Bright
244.0Moderate
253.9Moderate
263.9Moderate
273.9Moderate
283.9Moderate
293.8Moderate
303.8Moderate
Planning a trip in September

Hazard calendar for Minamiawaji

In seasonPeak

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

Minamiawaji 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 Minamiawaji?

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

6.5
Sightseeing
3rd-best month of the year
6.1
Beach & pool
3rd-best month of the year

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

What to pack for Minamiawaji in September

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

In September, Minamiawaji sees daytime highs around 26°C and nights near 24°C. Worth packing: light clothes and rain gear. About 12 days see rain.

light clothesrain gear

Sea temperature near Minamiawaji 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 15 km away) is warmest in August at about 27°C and coldest in February near 14°C.

It's comfortable for a long swim from Jun 5 to Nov 16 — about 5.4 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb14Bracing
Mar14Bracing
Apr16Cool
May18Cool
Jun21Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov20Refreshing
Dec17Cool

UV index in Minamiawaji 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 Minamiawaji peaks around July 10 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 10UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7High
May8Very high
Jun10Very high
Jul10Very high
Aug8Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Minamiawaji 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 Minamiawaji is worst in April — around 26 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (October, 14 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1625 µg/m³Oct 1914 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb19Moderate
Mar24Moderate
Apr26Moderate
May24Moderate
Jun21Moderate
Jul22Moderate
Aug24Moderate
Sep17Moderate
Oct14Moderate
Nov16Moderate
Dec15Moderate
Location & terrain

Where is Minamiawaji?

Minamiawaji sits at 34.3°N, 134.8°E, 53 m above sea level, in Japan. The nearest listed city is Fukura, 6.0 km away.

Topography around Minamiawaji

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

Within 3 km, the terrain around Minamiawaji has significant variations in elevation — a maximum elevation change of 355 m around an average of 77 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 600 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,941 m.

The land around Minamiawaji is covered by cropland (34%), trees (33%) and artificial surfaces (25%) within 3 km, water (51%) and trees (36%) within 16 km, and water (45%) and trees (41%) within 80 km.

3 km
355 m
16 km
600 m
80 km
1,941 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Fukura 6.0 km · Sumoto 13 km · Narutochō-mitsuishi 17 km · Awaji 27 km · Takabō 27 km · Yakami 29 km · Tokushima 30 km · Minato 35 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 Minamiawaji (34.274°, 134.7751°, elevation 53 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).