Toyonaka weather in September

In September, Toyonaka sees average daytime highs of 29°C and overnight lows near 21°C, with 163 mm of rain across 11.9 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 31°C in the first days to 26°C by the end. The sky is clear or mostly clear about 30% of the time in September, and the air most often feels muggy.

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 Toyonaka's 8th-clearest and 7th-windiest month. For the whole year in context, see Toyonaka's year-round climate.

Daytime high
29°
3rd warmest
Overnight low
21°
10th coldest
Rainfall
163 mm
11.9 wet days
Daylight
12 h 12 min
5:46 AM – 5:59 PM
Cloud cover
62%
8th clearest
Wind
8 km/h
7th windiest
Solar energy
4.18 kWh/m²
Travel score
5.3
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 31°C in the first days to 26°C by the end.

A typical September day in Toyonaka reaches about 29°C in the afternoon and slips back to 21°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 32°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)
13124
23124
33124
43123
53123
63123
73023
83023
93023
103022
113022
122922
132922
142922
152922
162921
172821
182821
192821
202820
212820
222720
232720
242720
252719
262719
272619
282619
292619
302618

How September really feels in Toyonaka

Once humidity and wind are folded in, September averages 8 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
8
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.

Toyonaka 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 daysSnow daysDaylight (hours)Travel score
Jan / 575.90.49.92.0
Feb10° / 647.20.710.72.3
Mar14° / 11010.70.211.73.8
Apr19° / 10°11910.4012.85.9
May24° / 15°14010.6013.86.7
Jun27° / 20°18913014.35.6
Jul31° / 24°18314.6014.14.0
Aug33° / 25°11011.8013.33.5
Sep29° / 21°16311.9012.25.3
Oct23° / 15°1519.5011.16.9
Nov17° / 817.2010.25.8
Dec12° / 626.80.19.73.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 55%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14654
24654
34654
44654
54654
64654
74654
84555
94555
104654
114555
124555
134555
144654
154654
164555
174456
184456
194357
204357
214555
224555
234555
244555
254555
264654
274753
284753
294753
304753

Chance of precipitation in September

Any precipitation

Toyonaka gets around 163 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 40% and peaks near 42% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
142
242
342
442
542
642
742
842
942
1042
1142
1241
1341
1440
1539
1639
1738
1838
1938
2038
2137
2237
2337
2437
2537
2638
2738
2838
2938
3038

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 28% of days. Sticky, muggy-or-worse air turns up on roughly 56% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1031230514
2031231504
3031331493
4041431473
5041532463
6141632453
7151732432
8151832412
9161933402
10172033381
11272133361
12282233341
13392432311
143102532291
154112631271
164122730251
175142830231
186152929210
196163028190
207173028170
218193127150
229203226130
2310213225120
2410223324100
251123332390
261224342280
271325342170
281426342060
291526342050
301627341940

Wind in September

Winds average 8 km/h in September.

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

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

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 5:35 AM to 5:57 AM, and sunset from 6:21 PM to 5:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:356:21
212.75:366:19
312.75:366:18
412.75:376:17
512.65:386:15
612.65:396:14
712.55:396:12
812.55:406:11
912.55:416:09
1012.45:426:08
1112.45:426:06
1212.45:436:05
1312.35:446:03
1412.35:456:02
1512.35:456:00
1612.25:465:59
1712.25:475:57
1812.15:475:56
1912.15:485:54
2012.15:495:53
2112.05:505:51
2212.05:515:50
2312.05:515:48
2411.95:525:47
2511.95:535:46
2611.85:545:44
2711.85:545:43
2811.85:555:41
2911.75:565:40
3011.75:575:38

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 2.36 kWh/m² to a high of 5.48 kWh/m² in May across the year — September's 4.18 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
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
224.0Moderate
234.0Moderate
243.9Moderate
253.9Moderate
263.9Moderate
273.8Moderate
283.8Moderate
293.8Moderate
303.7Moderate
Planning a trip in September

Hazard calendar for Toyonaka

In seasonPeak

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

Toyonaka 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 Toyonaka?

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

5.3
Sightseeing
6th-best month of the year
6.3
Beach & pool
1st-best month of the year

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

What to pack for Toyonaka in September

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

In September, Toyonaka sees daytime highs around 29°C and nights near 21°C. Pack light clothes. Worth having: rain gear. About 12 days see rain.

light clothesrain gear

Sea temperature near Toyonaka 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 20 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 11 — about 5.2 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
Dec17Cool

UV index in Toyonaka 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 Toyonaka peaks around July 10 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 10UV 10Dec 23UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7High
May8Very high
Jun10Very high
Jul10Very high
Aug8Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Toyonaka 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 Toyonaka is worst in April — around 23 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (October, 13 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1423 µg/m³Oct 1713 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb17Moderate
Mar22Moderate
Apr23Moderate
May22Moderate
Jun19Moderate
Jul17Moderate
Aug18Moderate
Sep14Moderate
Oct13Moderate
Nov14Moderate
Dec13Moderate
Location & terrain

Where is Toyonaka?

Toyonaka sits at 34.8°N, 135.5°E, 31 m above sea level, in Japan. The nearest listed city is Suita, 5.0 km away.

Topography around Toyonaka

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

Within 3 km, the terrain around Toyonaka has only modest variations in elevation — a maximum elevation change of 111 m around an average of 28 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 677 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,879 m.

The land around Toyonaka is covered by artificial surfaces (84%) within 3 km, artificial surfaces (62%) and trees (25%) within 16 km, and trees (63%) within 80 km.

3 km
111 m
16 km
677 m
80 km
1,879 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Suita 5.0 km · Minoh 5.0 km · Ikeda 6.0 km · Kawanishi 6.0 km · Itami 6.0 km · Amagasaki 9.0 km · Ibaraki 10 km · Osaka 10 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 Toyonaka (34.7824°, 135.4693°, elevation 31 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).