Amami weather in September

In September, Amami sees average daytime highs of 28°C and overnight lows near 26°C, with 175 mm of rain across 15.2 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 28°C in the first days to 27°C by the end. The sky is clear or mostly clear about 39% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 36 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Amami's 3rd-clearest and 8th-windiest month. For the whole year in context, see Amami's year-round climate.

Daytime high
28°
3rd warmest
Overnight low
26°
10th coldest
Rainfall
175 mm
15.2 wet days
Daylight
12 h 12 min
6:11 AM – 6:21 PM
Cloud cover
57%
3rd clearest
Wind
21 km/h
8th windiest
Solar energy
4.96 kWh/m²
Travel score
5.6
out of 10

Amami is city in Kagoshima prefecture, Japan.

Density
134/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 28°C in the first days to 27°C by the end.

A typical September day in Amami reaches about 28°C in the afternoon and slips back to 26°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 29°C. Set against its neighbours, September runs about 1°C cooler than August and about 3°C warmer than October.

20°23°25°28°30°151015202530
Avg high (°C)Avg low (°C)
12827
22827
32827
42827
52827
62827
72827
82827
92827
102827
112826
122826
132826
142826
152826
162826
172826
182726
192726
202726
212726
222726
232726
242726
252726
262725
272725
282725
292725
302725

How September really feels in Amami

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.

Amami 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
Jan17° / 15°12414.310.44.7
Feb17° / 15°12112.8114.8
Mar19° / 16°15714.511.85.3
Apr21° / 19°15813.212.75.8
May23° / 22°2101413.46.0
Jun26° / 25°32017.613.85.2
Jul29° / 27°12810.713.65.5
Aug29° / 27°14213.8135.2
Sep28° / 26°17515.212.25.6
Oct25° / 24°14912.611.36.5
Nov22° / 20°11810.910.66.4
Dec19° / 17°11012.910.25.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 46%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15347
25347
35248
45248
55248
65248
75248
85248
95248
105347
115347
125347
135446
145545
155545
165545
175644
185644
195545
205545
215545
225545
235644
245644
255545
265545
275545
285644
295644
305545

Chance of precipitation in September

Any precipitation

Amami gets around 175 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 49% and peaks near 52% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
149
250
350
451
551
651
752
852
952
1051
1151
1251
1350
1450
1550
1649
1749
1849
1949
2049
2149
2249
2348
2448
2547
2647
2747
2847
2946
3046

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 46% of days. Sticky, muggy-or-worse air turns up on roughly 95% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10042472
20042670
30052768
40052867
50052966
60163063
70163162
80173260
90173260
100183358
110293356
120293455
1303103453
1403113551
1504133548
1604143546
1705153644
1806163642
1906173640
2007183738
2117203736
2218213733
2318223831
2419233829
2519243827
26210253825
27211253924
28211263922
29212263921
30313273919

Wind in September

Winds average 21 km/h in September.

Across September, daily wind ranges from about 20 km/h on the calmest days to 23 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
120breezy
220breezy
320breezy
420breezy
520breezy
620breezy
720breezy
820breezy
921breezy
1021breezy
1121breezy
1221breezy
1321breezy
1421breezy
1521breezy
1621breezy
1722breezy
1822breezy
1922breezy
2022breezy
2122breezy
2222breezy
2322breezy
2422breezy
2522breezy
2623breezy
2723breezy
2823breezy
2923breezy
3023breezy

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 36 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 48 minutes over September. Sunrise moves from 6:04 AM to 6:19 AM, and sunset from 6:40 PM to 6:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.66:046:40
212.66:046:38
312.56:056:37
412.56:056:36
512.56:066:35
612.56:066:34
712.46:076:32
812.46:076:31
912.46:086:30
1012.36:086:29
1112.36:096:28
1212.36:096:26
1312.36:106:25
1412.26:106:24
1512.26:116:23
1612.26:116:21
1712.16:126:20
1812.16:126:19
1912.16:136:18
2012.16:136:16
2112.06:146:15
2212.06:146:14
2312.06:156:13
2411.96:156:11
2511.96:166:10
2611.96:166:09
2711.86:176:08
2811.86:176:07
2911.86:186:05
3011.86:196:04

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.96 kWh/m².

For context, solar energy here swings from a low near 2.19 kWh/m² to a high of 6.23 kWh/m² in July across the year — September's 4.96 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.4Bright
35.4Bright
45.4Bright
55.3Bright
65.3Bright
75.3Bright
85.2Bright
95.2Bright
105.2Bright
115.2Bright
125.1Bright
135.1Bright
145.1Bright
155.0Bright
165.0Bright
175.0Bright
184.9Bright
194.9Bright
204.8Bright
214.8Bright
224.8Bright
234.7Bright
244.7Bright
254.7Bright
264.6Bright
274.6Bright
284.5Bright
294.5Bright
304.5Bright
Planning a trip in September

Hazard calendar for Amami

In seasonPeak

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

Amami 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 Amami?

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

5.6
Sightseeing
5th-best month of the year
6.0
Beach & pool
3rd-best month of the year

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

What to pack for Amami in September

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

In September, Amami sees daytime highs around 28°C and nights near 26°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 Amami 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 21°C.

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

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan22Refreshing
Feb21Refreshing
Mar21Refreshing
Apr22Refreshing
May24Refreshing
Jun26Warm
Jul28Tropical
Aug29Tropical
Sep28Tropical
Oct27Warm
Nov25Warm
Dec23Refreshing

UV index in Amami 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 Amami peaks around July 14 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJul 14UV 11Jan 10UV 4
UV index (midday)Level
Jan4Moderate
Feb6High
Mar8Very high
Apr9Very high
May9Very high
Jun11Extreme
Jul12Extreme
Aug10Extreme
Sep10Extreme
Oct7Very high
Nov6High
Dec4Moderate

Air quality in Amami 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 Amami is worst in April — around 17 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (July, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1017 µg/m³Jul 178 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb15Moderate
Mar17Moderate
Apr17Moderate
May14Moderate
Jun9Good
Jul8Good
Aug9Good
Sep9Good
Oct9Good
Nov10Good
Dec10Good
Location & terrain

Where is Amami?

Amami sits at 28.4°N, 129.5°E, 21 m above sea level, in Japan. The nearest listed city is Naze, 2.0 km away.

TsuhaNagoYakushimaIshikawaUrumaGushikawaKatsuren-haebaru

Topography around Amami

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

Within 3 km, the terrain around Amami has significant variations in elevation — a maximum elevation change of 376 m around an average of 130 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 517 m; within 80 km, large variations in elevation — a maximum elevation change of 682 m.

The land around Amami is covered by trees (82%) within 3 km, water (59%) and trees (39%) within 16 km, and water (95%) within 80 km.

3 km
376 m
16 km
517 m
80 km
682 m
treesartificial surfaceswater
September weather nearby: Naze 2.0 km · Tsuha 236 km · Nago 246 km · Yakushima 250 km · Ishikawa 273 km · Uruma 275 km · Gushikawa 276 km · Katsuren-haebaru 278 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 Amami (28.3769°, 129.4938°, elevation 21 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).