Yamazakichō-nakabirose weather in September

In September, Yamazakichō-nakabirose sees average daytime highs of 27°C and overnight lows near 19°C, with 204 mm of rain across 12.3 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 29°C in the first days to 25°C by the end. The sky is clear or mostly clear about 27% of the time in September, and the air most often feels humid.

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 Yamazakichō-nakabirose's 9th-clearest and 6th-windiest month. For the whole year in context, see Yamazakichō-nakabirose's year-round climate.

Daytime high
27°
3rd warmest
Overnight low
19°
10th coldest
Rainfall
204 mm
12.3 wet days
Daylight
12 h 12 min
5:50 AM – 6:03 PM
Cloud cover
63%
9th clearest
Wind
9 km/h
6th windiest
Solar energy
4.28 kWh/m²
Travel score
5.9
out of 10

Yamazakichō-nakabirose is human settlement in Japan.

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 29°C in the first days to 25°C by the end.

A typical September day in Yamazakichō-nakabirose reaches about 27°C in the afternoon and slips back to 19°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 30°C. Set against its neighbours, September runs about 4°C cooler than August and about 5°C warmer than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12922
22922
32922
42921
52921
62921
72821
82821
92821
102820
112820
122820
132720
142720
152720
162719
172719
182719
192619
202619
212618
222618
232618
242618
252518
262517
272517
282517
292517
302417

How September really feels in Yamazakichō-nakabirose

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.

Yamazakichō-nakabirose 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 / 455.71.29.91.4
Feb / 607.3210.71.8
Mar13° / 11511.10.411.73.3
Apr18° / 12910.5012.95.6
May22° / 13°15010.7013.86.5
Jun26° / 18°18813.6014.35.8
Jul29° / 22°22716.4014.14.5
Aug31° / 23°14413.4013.34.3
Sep27° / 19°20412.3012.25.9
Oct22° / 13°1308.4011.16.9
Nov16° / 686.3010.25.4
Dec10° / 556.10.59.72.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 55%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14456
24456
34555
44555
54555
64555
74555
84555
94654
104654
114555
124654
134654
144555
154555
164456
174456
184456
194456
204357
214456
224456
234456
244555
254555
264555
274654
284654
294654
304753

Chance of precipitation in September

Any precipitation

Yamazakichō-nakabirose gets around 204 mm of rain over 12.3 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 40% and peaks near 45% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
144
244
344
445
545
645
745
844
944
1044
1143
1243
1342
1441
1540
1640
1739
1839
1938
2038
2137
2237
2337
2437
2536
2636
2736
2836
2936
3035

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 26% of days. Sticky, muggy-or-worse air turns up on roughly 48% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1051628473
2051729453
3061929443
4062029422
5172130402
6172230382
7182330372
8192430352
9292530331
102102630311
113112630291
124122729271
134132829251
145142828231
156152927211
168172926201
179182926180
1810193025160
1911203023150
2013223022130
2114232921120
2215242920110
2316262919100
241827281890
251928281880
262029271770
272130271660
282331261550
292432251440
302632251440

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

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 6:00 AM, and sunset from 6:25 PM to 5:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:386:25
212.75:396:23
312.75:406:22
412.75:416:20
512.65:416:19
612.65:426:17
712.65:436:16
812.55:446:15
912.55:446:13
1012.45:456:12
1112.45:466:10
1212.45:476:09
1312.35:476:07
1412.35:486:06
1512.35:496:04
1612.25:506:03
1712.25:506:01
1812.15:516:00
1912.15:525:58
2012.15:535:57
2112.05:535:55
2212.05:545:54
2312.05:555:52
2411.95:565:51
2511.95:565:49
2611.85:575:48
2711.85:585:46
2811.85:595:45
2911.76:005:43
3011.76:005:42

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.28 kWh/m².

For context, solar energy here swings from a low near 2.3 kWh/m² to a high of 5.71 kWh/m² in May across the year — September's 4.28 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.7Bright
54.7Bright
64.6Bright
74.6Bright
84.6Bright
94.5Bright
104.5Bright
114.5Bright
124.4Bright
134.4Bright
144.3Bright
154.3Bright
164.3Bright
174.3Bright
184.2Bright
194.2Bright
204.2Bright
214.1Bright
224.1Bright
234.1Bright
244.0Bright
254.0Bright
264.0Moderate
274.0Moderate
283.9Moderate
293.9Moderate
303.9Moderate
Planning a trip in September

Hazard calendar for Yamazakichō-nakabirose

In seasonPeak

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

Yamazakichō-nakabirose sits in the Pacific typhoon belt; the season peaks July–October.

Yamazakichō-nakabirose's rainy season runs March–October, when most of the year's rain falls.

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

Is September a good time to visit Yamazakichō-nakabirose?

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
6.2
Beach & pool
1st-best month of the year

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

What to pack for Yamazakichō-nakabirose in September

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

In September, Yamazakichō-nakabirose sees daytime highs around 27°C and nights near 19°C. Worth packing: light clothes and rain gear. About 12 days see rain.

light clothesrain gear

Sea temperature near Yamazakichō-nakabirose 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 42 km away) is warmest in August at about 27°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 7 to Nov 13 — about 5.3 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar13Bracing
Apr15Cool
May18Cool
Jun21Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov20Cool
Dec16Cool

UV index in Yamazakichō-nakabirose 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 Yamazakichō-nakabirose peaks around July 13 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 highVery highModerateJul 13UV 10Dec 22UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7High
May8Very high
Jun10Very high
Jul10Extreme
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec2Moderate

Air quality in Yamazakichō-nakabirose 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 Yamazakichō-nakabirose is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (October, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1421 µg/m³Oct 1711 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb16Moderate
Mar20Moderate
Apr21Moderate
May19Moderate
Jun17Moderate
Jul14Moderate
Aug12Moderate
Sep12Good
Oct10Good
Nov12Good
Dec11Good
Location & terrain

Where is Yamazakichō-nakabirose?

Yamazakichō-nakabirose sits at 35.0°N, 134.6°E, 95 m above sea level, in Japan. The nearest listed city is Shisō, 2.0 km away.

Topography around Yamazakichō-nakabirose

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

Within 3 km, the terrain around Yamazakichō-nakabirose has significant variations in elevation — a maximum elevation change of 446 m around an average of 185 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,000 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,489 m.

The land around Yamazakichō-nakabirose is covered by trees (68%) and artificial surfaces (20%) within 3 km, trees (87%) within 16 km, and trees (64%) and water (24%) within 80 km.

3 km
446 m
16 km
1,000 m
80 km
1,489 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Shisō 2.0 km · Tatsunochō-tominaga 15 km · Sayō 17 km · Ikaruga 19 km · Tatsuno 19 km · Nishitawara 20 km · Kamigōri 22 km · Aioi 23 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 Yamazakichō-nakabirose (35°, 134.55°, elevation 95 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).