Aobadai weather in September

In September, Aobadai sees average daytime highs of 26°C and overnight lows near 21°C, with 193 mm of rain across 14.2 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 23°C by the end. The sky is clear or mostly clear about 25% 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 Aobadai's 9th-clearest and 4th-windiest month. For the whole year in context, see Aobadai's year-round climate.

Daytime high
26°
3rd warmest
Overnight low
21°
10th coldest
Rainfall
193 mm
14.2 wet days
Daylight
12 h 12 min
5:30 AM – 5:43 PM
Cloud cover
66%
9th clearest
Wind
12 km/h
4th windiest
Solar energy
3.72 kWh/m²
Travel score
5.9
out of 10

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 23°C by the end.

A typical September day in Aobadai reaches about 26°C in the afternoon and slips back to 21°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 29°C. Set against its neighbours, September runs about 3°C cooler than August and about 5°C warmer than October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12823
22823
32823
42823
52723
62723
72722
82722
92722
102722
112722
122622
132622
142621
152621
162621
172621
182521
192520
202520
212520
222520
232420
242419
252419
262419
272419
282419
292318
302318

How September really feels in Aobadai

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.

Aobadai 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 daysSnow daysDaylight (hours)Travel score
Jan / 757.829.92.0
Feb10° / 748.82.310.72.1
Mar13° / 13413.51.311.73.2
Apr17° / 10°12512.60.212.95.0
May21° / 15°13712.4013.86.0
Jun24° / 19°17614.6014.45.7
Jul27° / 23°16714.3014.25.5
Aug29° / 24°12513.2013.35.2
Sep26° / 21°19314.2012.25.9
Oct21° / 15°21113.3011.16.0
Nov16° / 10°9910.5010.15.0
Dec11° / 677.90.39.63.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% 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 60%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14357
24357
34456
44357
54357
64357
74258
84357
94258
104258
114258
124258
134159
144159
154060
164060
174060
184060
193862
203862
213862
223862
233763
243664
253664
263763
273763
283763
293763
303862

Chance of precipitation in September

Any precipitation

Aobadai gets around 193 mm of rain over 14.2 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 48% and peaks near 48% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
146
246
347
447
547
647
747
848
948
1048
1148
1248
1348
1448
1548
1648
1748
1848
1948
2048
2148
2248
2348
2448
2548
2648
2748
2848
2948
3048

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 31% of days. Sticky, muggy-or-worse air turns up on roughly 63% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1018275113
2018285112
3019285111
4019295110
5011029519
6021130498
7021230487
8031331476
9031431456
10141532445
11151632424
12161732404
13271932383
14282032363
15292132342
163102331312
174112431291
184122630271
195132730241
206152829221
216162928200
227173128170
238183227150
248193326140
259203425120
2610213524100
271122362390
281222372270
291323372160
301424372050

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light 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 5:18 AM to 5:41 AM, and sunset from 6:05 PM to 5:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:186:05
212.85:196:04
312.75:206:02
412.75:206:01
512.65:215:59
612.65:225:58
712.65:235:56
812.55:235:55
912.55:245:53
1012.45:255:52
1112.45:265:50
1212.45:275:49
1312.35:275:47
1412.35:285:46
1512.35:295:44
1612.25:305:43
1712.25:305:41
1812.15:315:40
1912.15:325:38
2012.15:335:37
2112.05:345:35
2212.05:345:34
2312.05:355:32
2411.95:365:31
2511.95:375:29
2611.85:385:28
2711.85:385:26
2811.85:395:25
2911.75:405:23
3011.75:415:22

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.72 kWh/m².

For context, solar energy here swings from a low near 2.29 kWh/m² to a high of 5.08 kWh/m² in May across the year — September's 3.72 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.3Bright
24.3Bright
34.2Bright
44.2Bright
54.1Bright
64.1Bright
74.1Bright
84.0Bright
94.0Moderate
103.9Moderate
113.9Moderate
123.9Moderate
133.8Moderate
143.8Moderate
153.7Moderate
163.7Moderate
173.6Moderate
183.6Moderate
193.6Moderate
203.5Moderate
213.5Moderate
223.5Moderate
233.4Moderate
243.4Moderate
253.3Moderate
263.3Moderate
273.3Moderate
283.2Moderate
293.2Moderate
303.2Moderate
Planning a trip in September

Hazard calendar for Aobadai

In seasonPeak

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

Aobadai 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 Aobadai?

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

5.9
Sightseeing
3rd-best month of the year
5.5
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Aobadai for sightseeing.

What to pack for Aobadai in September

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

In September, Aobadai sees daytime highs around 26°C and nights near 21°C. Pack rain gear. Worth having: light clothes. About 14 days see rain.

rain gearlight clothes

Sea temperature near Aobadai in September

The nearest coast averages about 25°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 34 km away) is warmest in August at about 26°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 7 to Nov 3 — about 4.9 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar13Bracing
Apr15Cool
May18Cool
Jun21Refreshing
Jul23Refreshing
Aug26Warm
Sep25Warm
Oct22Refreshing
Nov19Cool
Dec16Cool

UV index in Aobadai 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 Aobadai peaks around July 20 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 20UV 10Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug10Very high
Sep9Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Aobadai 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 Aobadai is worst in April — around 26 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1525 µg/m³Dec 1612 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb25Moderate
Mar23Moderate
Apr26Moderate
May21Moderate
Jun18Moderate
Jul13Moderate
Aug12Moderate
Sep12Moderate
Oct14Moderate
Nov14Moderate
Dec12Good
Location & terrain

Where is Aobadai?

Aobadai sits at 35.5°N, 139.5°E, 46 m above sea level, in Japan. The nearest listed city is Azamino, 4.0 km away.

Topography around Aobadai

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

Within 3 km, the terrain around Aobadai has only modest variations in elevation — a maximum elevation change of 74 m around an average of 43 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 188 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,737 m.

The land around Aobadai is covered by artificial surfaces (69%) and trees (26%) within 3 km, artificial surfaces (74%) within 16 km, and trees (41%), artificial surfaces (24%) and water (22%) within 80 km.

3 km
74 m
16 km
188 m
80 km
3,737 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Azamino 4.0 km · Machida 6.0 km · Bunkyo 9.0 km · Minamirinkan 9.0 km · Noborito 9.0 km · Inagi 10 km · Yamato 10 km · Komae 11 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 Aobadai (35.5465°, 139.5172°, elevation 46 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).