Nishio weather in September

In September, Nishio sees average daytime highs of 26°C and overnight lows near 23°C, with 214 mm of rain across 13 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 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 Nishio's 9th-clearest and 9th-windiest month. For the whole year in context, see Nishio's year-round climate.

Daytime high
26°
3rd warmest
Overnight low
23°
10th coldest
Rainfall
214 mm
13 wet days
Daylight
12 h 12 min
5:40 AM – 5:53 PM
Cloud cover
58%
9th clearest
Wind
18 km/h
9th windiest
Solar energy
4.31 kWh/m²
Travel score
6.2
out of 10

Nishio is city in Aichi Prefecture, Japan.

Founded
1953

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 24°C by the end.

A typical September day in Nishio reaches about 26°C in the afternoon and slips back to 23°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 28°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)
12825
22825
32825
42825
52824
62724
72724
82724
92724
102724
112724
122723
132723
142623
152623
162623
172623
182623
192622
202622
212522
222522
232522
242522
252521
262521
272521
282421
292421
302421

How September really feels in Nishio

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.

Nishio 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
Jan10° / 739.30.59.92.2
Feb10° / 769.10.410.72.4
Mar13° / 12010.5011.73.6
Apr17° / 12°1299.9012.95.3
May20° / 16°15410013.86.3
Jun24° / 21°20913.2014.36.0
Jul27° / 24°18113014.15.8
Aug29° / 26°10810.9013.35.7
Sep26° / 23°21413012.26.2
Oct22° / 18°21511.1011.16.6
Nov17° / 13°998010.25.8
Dec12° / 688.50.19.73.5

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 12% of September, with mostly cloudy or overcast conditions the remaining 52%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15149
25149
35149
45149
55050
65050
75050
85050
94852
104852
114852
124951
134852
144852
154852
164852
174753
184852
194852
204654
214753
224753
234654
244753
254753
264654
274654
284753
294753
304654

Chance of precipitation in September

Any precipitation

Nishio gets around 214 mm of rain over 13 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 44% and peaks near 46% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
143
243
344
444
544
645
745
845
946
1046
1146
1245
1345
1444
1544
1644
1743
1843
1943
2043
2142
2242
2342
2442
2542
2642
2742
2842
2942
3042

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 32% of days. Sticky, muggy-or-worse air turns up on roughly 72% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1004234627
2014244625
3014254624
4015264623
5016264521
6017274520
7028284419
8028294417
9029294316
100310304214
110311314113
120413314012
130514323911
140515323710
15061633369
16171833348
17181934327
18192134306
192102234285
202112334264
212122534243
223132633223
233142733202
244152933182
254153032162
265163132151
275173231131
286183431111
296193430101
30720352991

Wind in September

Winds average 18 km/h in September.

Across September, daily wind ranges from about 16 km/h on the calmest days to 19 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
116light breeze
217light breeze
317light breeze
417light breeze
517light breeze
617light breeze
717light breeze
817light breeze
917light breeze
1017light breeze
1117light breeze
1218light breeze
1318light breeze
1418light breeze
1518light breeze
1618light breeze
1718light breeze
1818light breeze
1918light breeze
2018light breeze
2118light breeze
2218light breeze
2318light breeze
2419light breeze
2519light breeze
2619light breeze
2719light breeze
2819light breeze
2919light breeze
3019light 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 5:28 AM to 5:50 AM, and sunset from 6:15 PM to 5:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:286:15
212.75:296:13
312.75:306:12
412.75:316:10
512.65:316:09
612.65:326:07
712.55:336:06
812.55:346:04
912.55:346:03
1012.45:356:02
1112.45:366:00
1212.45:375:59
1312.35:375:57
1412.35:385:56
1512.35:395:54
1612.25:405:53
1712.25:405:51
1812.15:415:50
1912.15:425:48
2012.15:435:47
2112.05:435:45
2212.05:445:44
2312.05:455:42
2411.95:465:41
2511.95:465:39
2611.85:475:38
2711.85:485:36
2811.85:495:35
2911.75:505:33
3011.75:505:32

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.31 kWh/m².

For context, solar energy here swings from a low near 2.59 kWh/m² to a high of 5.57 kWh/m² in May across the year — September's 4.31 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.8Bright
34.8Bright
44.8Bright
54.7Bright
64.7Bright
74.6Bright
84.6Bright
94.5Bright
104.5Bright
114.5Bright
124.4Bright
134.4Bright
144.4Bright
154.3Bright
164.3Bright
174.3Bright
184.2Bright
194.2Bright
204.2Bright
214.1Bright
224.1Bright
234.0Bright
244.0Bright
254.0Moderate
264.0Moderate
273.9Moderate
283.9Moderate
293.9Moderate
303.8Moderate
Planning a trip in September

Hazard calendar for Nishio

In seasonPeak

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

Nishio 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 Nishio?

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

6.2
Sightseeing
3rd-best month of the year
6.0
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Nishio for sightseeing.

What to pack for Nishio in September

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

In September, Nishio sees daytime highs around 26°C and nights near 23°C. Worth packing: light clothes and rain gear. About 13 days see rain.

light clothesrain gear

Sea temperature near Nishio 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 16 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 May 31 to Nov 9 — about 5.4 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
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct22Refreshing
Nov19Cool
Dec17Cool

UV index in Nishio 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 Nishio peaks around July 11 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 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 11UV 10Dec 23UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May8Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Nishio 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 Nishio is worst in April — around 25 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (July, 15 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1325 µg/m³Jul 2415 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb19Moderate
Mar25Moderate
Apr25Moderate
May24Moderate
Jun20Moderate
Jul15Moderate
Aug15Moderate
Sep16Moderate
Oct18Moderate
Nov18Moderate
Dec16Moderate
Location & terrain

Where is Nishio?

Nishio sits at 34.9°N, 137.1°E, 9 m above sea level, in Japan. The nearest listed city is Hekinan, 6.0 km away.

Topography around Nishio

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

Within 3 km, the terrain around Nishio has only modest variations in elevation — a maximum elevation change of 66 m around an average of 6 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 446 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,984 m.

The land around Nishio is covered by artificial surfaces (57%) and cropland (26%) within 3 km, artificial surfaces (36%) and water (24%) within 16 km, and trees (46%) and water (30%) within 80 km.

3 km
66 m
16 km
446 m
80 km
1,984 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Hekinan 6.0 km · Ishiki 8.0 km · Takahama 8.0 km · Anjō 11 km · Handa 11 km · Kōta 11 km · Taketoyo 12 km · Ogawa 13 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 Nishio (34.8667°, 137.05°, elevation 9 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).