Nishiwaki weather in September

In September, Nishiwaki sees average daytime highs of 28°C and overnight lows near 20°C, with 194 mm of rain across 11.9 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 30°C in the first days to 25°C by the end. The sky is clear or mostly clear about 28% 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 Nishiwaki's 7th-clearest and 3rd-windiest month. For the whole year in context, see Nishiwaki's year-round climate.

Daytime high
28°
3rd warmest
Overnight low
20°
10th coldest
Rainfall
194 mm
11.9 wet days
Daylight
12 h 12 min
5:48 AM – 6:01 PM
Cloud cover
63%
7th clearest
Wind
10 km/h
3rd windiest
Solar energy
4.18 kWh/m²
Travel score
5.8
out of 10

Nishiwaki is city in Hyōgo Prefecture, Japan.

Density
292/km²
people per km²
Founded
2005

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 30°C in the first days to 25°C by the end.

A typical September day in Nishiwaki reaches about 28°C in the afternoon and slips back to 20°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 31°C. Set against its neighbours, September runs about 4°C cooler than August and about 6°C warmer than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13022
23022
33022
43022
53022
62922
72922
82921
92921
102921
112821
122821
132820
142820
152820
162820
172720
182719
192719
202719
212719
222619
232618
242618
252618
262618
272518
282517
292517
302517

How September really feels in Nishiwaki

Once humidity and wind are folded in, September averages 2 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
2
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.

Nishiwaki 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 / 506.51.29.91.6
Feb / 607.61.510.72.0
Mar13° / 10610.70.211.73.5
Apr18° / 11710.6012.95.7
May23° / 14°13810.5013.86.6
Jun26° / 19°16912.9014.35.8
Jul30° / 23°19714.7014.14.4
Aug32° / 24°12111.9013.34.0
Sep28° / 20°19411.9012.25.8
Oct22° / 13°1408.8011.16.9
Nov16° / 716.3010.25.6
Dec11° / 596.50.49.72.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 56%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14456
24555
34555
44456
54555
64456
74555
84555
94555
104456
114555
124654
134456
144456
154456
164456
174456
184456
194357
204456
214258
224357
234456
244456
254456
264456
274555
284555
294555
304654

Chance of precipitation in September

Any precipitation

Nishiwaki gets around 194 mm of rain over 11.9 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 42% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
141
242
342
442
542
642
742
842
942
1041
1141
1240
1340
1439
1539
1638
1738
1837
1937
2037
2137
2236
2336
2436
2536
2636
2736
2836
2936
3036

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 49% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1041529483
2041630473
3051730462
4151929442
5162029432
6162129412
7172229392
8182429372
9292528351
10292628331
113102628311
123112728291
134122827271
145142827251
156152926231
167162926211
178173025190
189183025180
1910193024160
2011203024140
2113223023120
2214233023110
2315243022100
241625302180
251725302070
261826301960
272027301850
282128301740
292228291640
302329291530

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

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 5:37 AM to 5:59 AM, and sunset from 6:23 PM to 5:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:376:23
212.75:376:22
312.75:386:20
412.75:396:19
512.65:406:17
612.65:406:16
712.65:416:14
812.55:426:13
912.55:436:11
1012.45:436:10
1112.45:446:08
1212.45:456:07
1312.35:466:05
1412.35:466:04
1512.35:476:02
1612.25:486:01
1712.25:495:59
1812.15:495:58
1912.15:505:56
2012.15:515:55
2112.05:525:53
2212.05:525:52
2312.05:535:50
2411.95:545:49
2511.95:555:47
2611.85:565:46
2711.85:565:45
2811.85:575:43
2911.75:585:42
3011.75:595:40

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.18 kWh/m².

For context, solar energy here swings from a low near 2.32 kWh/m² to a high of 5.56 kWh/m² in May across the year — September's 4.18 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.6Bright
54.6Bright
64.5Bright
74.5Bright
84.5Bright
94.4Bright
104.4Bright
114.3Bright
124.3Bright
134.3Bright
144.3Bright
154.2Bright
164.2Bright
174.2Bright
184.1Bright
194.1Bright
204.1Bright
214.0Bright
224.0Bright
234.0Moderate
243.9Moderate
253.9Moderate
263.9Moderate
273.9Moderate
283.8Moderate
293.8Moderate
303.8Moderate
Planning a trip in September

Hazard calendar for Nishiwaki

In seasonPeak

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

Nishiwaki 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 Nishiwaki?

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

5.8
Sightseeing
3rd-best month of the year
6.3
Beach & pool
1st-best month of the year

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

What to pack for Nishiwaki in September

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

In September, Nishiwaki sees daytime highs around 28°C and nights near 20°C. Pack light clothes. Worth having: rain gear. About 12 days see rain.

light clothesrain gear

Sea temperature near Nishiwaki 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 41 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 6 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
Mar14Bracing
Apr15Cool
May18Cool
Jun21Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov20Cool
Dec17Cool

UV index in Nishiwaki 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 Nishiwaki peaks around July 12 at about 10 (very high) — 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 highModerateJul 12UV 10Dec 22UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7High
May8Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec2Moderate

Air quality in Nishiwaki 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 Nishiwaki is worst in April — around 22 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (October, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1622 µg/m³Oct 1811 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb16Moderate
Mar21Moderate
Apr22Moderate
May21Moderate
Jun18Moderate
Jul17Moderate
Aug17Moderate
Sep13Moderate
Oct11Good
Nov12Moderate
Dec12Good
Location & terrain

Where is Nishiwaki?

Nishiwaki sits at 35.0°N, 135.0°E, 57 m above sea level, in Japan. The nearest listed city is Yashiro, 8.0 km away.

Topography around Nishiwaki

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

Within 3 km, the terrain around Nishiwaki has significant variations in elevation — a maximum elevation change of 337 m around an average of 116 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 903 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,488 m.

The land around Nishiwaki is covered by trees (56%) and artificial surfaces (28%) within 3 km, trees (69%) within 16 km, and trees (62%) and water (21%) within 80 km.

3 km
337 m
16 km
903 m
80 km
1,488 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Yashiro 8.0 km · Katō 8.0 km · Kajiya 11 km · Kasai 13 km · Ono 15 km · Nishitawara 19 km · Tanba 20 km · Miki 20 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 Nishiwaki (34.9842°, 134.9741°, elevation 57 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).